Fish for a 100 gallon tank

213 fish and 20 shrimp, snails or amphibians fit a 100 gallon tank as adults. A 100 gallon fits large schools and several centerpiece fish together.

A species fits when its adult group fits this size of tank. Together they still have to share water and temperament: check your mix in the stocking checker.

233 species

Scroll sideways to see them all. All drawn at one scale, adult size: = 1 inch. Tap one to open its care page.
Neon tetra

Neon tetra

Peaceful · Middle · easy care

  • 1.6 in adult
  • 10+ gal
  • 70–79 °F
  • pH 6 to 7.5
  • groups of 6+
Betta (Siamese fighting fish)

Betta

Semi-aggressive · Top · easy care

  • 3 in adult
  • 5+ gal
  • 76–82 °F
  • pH 6 to 7.5
  • one male per tank
Guppy

Guppy

Peaceful · Top · easy care

  • 2.8 in adult
  • 10+ gal
  • 72–82 °F
  • pH 7 to 8
  • groups of 3+
Platy

Platy

Peaceful · Middle · easy care

  • 2.5 in adult
  • 10+ gal
  • 70–80 °F
  • pH 7 to 8.2
  • groups of 3+
Bronze corydoras

Bronze corydoras

Peaceful · Bottom · easy care

  • 2.75 in adult
  • 20+ gal
  • 72–80 °F
  • pH 6 to 8
  • groups of 6+
Harlequin rasbora

Harlequin rasbora

Peaceful · Middle · easy care

  • 2 in adult
  • 10+ gal
  • 72–81 °F
  • pH 6 to 7.5
  • groups of 8+
Angelfish

Angelfish

Semi-aggressive · Middle · moderate care

  • 6 in adult
  • 29+ gal
  • 76–84 °F
  • pH 6 to 7.5
  • alone or pair
Zebra danio

Zebra danio

Peaceful · Top · easy care

  • 2 in adult
  • 10+ gal
  • 64–77 °F
  • pH 6.5 to 8
  • groups of 6+
Cardinal tetra

Cardinal tetra

Peaceful · Middle · moderate care

  • 1.2 in adult
  • 20+ gal
  • 73–81 °F
  • pH 5 to 7
  • groups of 8+
Ember tetra

Ember tetra

Peaceful · Middle · easy care

  • 1.2 in adult
  • 10+ gal
  • 73–84 °F
  • pH 6 to 7.5
  • groups of 8+
Molly

Molly

Peaceful · Middle · easy care

  • 3.9 in adult
  • 29+ gal
  • 72–82 °F
  • pH 7.5 to 8.5
  • groups of 3+
Honey gourami

Honey gourami

Peaceful · Top · easy care

  • 2 in adult
  • 10+ gal
  • 72–82 °F
  • pH 6 to 7.5
  • alone or pair
Dwarf gourami

Dwarf gourami

Peaceful · Top · moderate care

  • 3.5 in adult
  • 10+ gal
  • 77–82 °F
  • pH 6 to 7.5
  • one male per tank
Otocinclus

Otocinclus

Peaceful · Bottom · moderate care

  • 2 in adult
  • 20+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 6+
Bristlenose pleco

Bristlenose pleco

Peaceful · Bottom · easy care

  • 6 in adult
  • 29+ gal
  • 73–81 °F
  • pH 6.5 to 7.5
  • alone or pair
Kuhli loach

Kuhli loach

Peaceful · Bottom · easy care

  • 4 in adult
  • 20+ gal
  • 75–82 °F
  • pH 5.5 to 7
  • groups of 5+
Panda corydoras

Panda corydoras

Peaceful · Bottom · easy care

  • 2 in adult
  • 15+ gal
  • 68–77 °F
  • pH 6 to 7.5
  • groups of 6+
Fancy goldfish

Fancy goldfish

Peaceful · All levels · easy care

  • 8 in adult
  • 20+ gal
  • 64–74 °F
  • pH 7 to 8
  • groups of 2+
Chili rasbora

Chili rasbora

Peaceful · Middle · moderate care

  • 0.8 in adult
  • 5+ gal
  • 72–82 °F
  • pH 5 to 7
  • groups of 8+
Celestial pearl danio

Celestial pearl danio

Peaceful · Middle · moderate care

  • 1 in adult
  • 10+ gal
  • 72–78 °F
  • pH 6.5 to 7.5
  • groups of 6+
Endler's livebearer

Endler's livebearer

Peaceful · Top · easy care

  • 1.8 in adult
  • 10+ gal
  • 72–82 °F
  • pH 7 to 8
  • groups of 3+
Cherry barb

Cherry barb

Peaceful · Middle · easy care

  • 2 in adult
  • 20+ gal
  • 73–81 °F
  • pH 6 to 7.5
  • groups of 6+
Tiger barb

Tiger barb

Semi-aggressive · Middle · easy care

  • 3 in adult
  • 29+ gal
  • 74–80 °F
  • pH 6 to 8
  • groups of 6+
Swordtail

Swordtail

Peaceful · Middle · easy care

  • 5.5 in adult
  • 29+ gal
  • 72–82 °F
  • pH 7 to 8.4
  • groups of 3+
Pygmy corydoras

Pygmy corydoras

Peaceful · Middle · moderate care

  • 1 in adult
  • 10+ gal
  • 72–79 °F
  • pH 6 to 8
  • groups of 6+
Rummy-nose tetra

Rummy-nose tetra

Peaceful · Middle · moderate care

  • 2 in adult
  • 20+ gal
  • 75–82 °F
  • pH 5.5 to 7
  • groups of 8+
Black neon tetra

Black neon tetra

Peaceful · Middle · easy care

  • 1.5 in adult
  • 10+ gal
  • 73–81 °F
  • pH 5.5 to 7.5
  • groups of 6+
Glowlight tetra

Glowlight tetra

Peaceful · Middle · easy care

  • 1.5 in adult
  • 10+ gal
  • 72–80 °F
  • pH 6 to 7.5
  • groups of 6+
Pearl gourami

Pearl gourami

Peaceful · Top · easy care

  • 4.5 in adult
  • 29+ gal
  • 77–82 °F
  • pH 6 to 7.5
  • alone or pair
German blue ram

German blue ram

Peaceful · Bottom · demanding care

  • 3 in adult
  • 20+ gal
  • 78–85 °F
  • pH 5 to 7
  • alone or pair
Kribensis

Kribensis

Semi-aggressive · Bottom · easy care

  • 4 in adult
  • 29+ gal
  • 75–80 °F
  • pH 6 to 7.5
  • alone or pair
Cockatoo dwarf cichlid (apistogramma)

Cockatoo dwarf cichlid

Semi-aggressive · Bottom · moderate care

  • 3 in adult
  • 20+ gal
  • 75–84 °F
  • pH 5.5 to 7.5
  • alone or pair
Pea puffer

Pea puffer

Aggressive · All levels · moderate care

  • 1.4 in adult
  • 10+ gal
  • 72–82 °F
  • pH 7 to 8.3
  • groups of 3+
Acei cichlid (yellow-tail acei)

Acei cichlid

Semi-aggressive · Middle · easy care

  • 6 in adult
  • 55+ gal
  • 74–82 °F
  • pH 7.5 to 8.5
  • groups of 6+
African butterflyfish

African butterflyfish

Semi-aggressive · Top · moderate care

  • 5 in adult
  • 30+ gal
  • 73–86 °F
  • pH 6.5 to 7.5
  • alone or pair
Agassiz's dwarf cichlid

Agassiz's dwarf cichlid

Semi-aggressive · Bottom · moderate care

  • 1.7 in adult
  • 20+ gal
  • 75–84 °F
  • pH 5 to 7
  • alone or pair
Amazon puffer

Amazon puffer

Semi-aggressive · All levels · moderate care

  • 5 in adult
  • 29+ gal
  • 74–82 °F
  • pH 6.5 to 7.5
  • groups of 3+
American flagfish

American flagfish

Semi-aggressive · Middle · easy care

  • 2.5 in adult
  • 20+ gal
  • 65–79 °F
  • pH 6.5 to 8.5
  • alone or pair

Asian stone catfish

Peaceful · Bottom · moderate care

  • 1.6 in adult
  • 10+ gal
  • 64–75 °F
  • pH 6.5 to 7.5
  • groups of 3+
Auratus cichlid

Auratus cichlid

Aggressive · Middle · moderate care

  • 4.3 in adult
  • 55+ gal
  • 73–82 °F
  • pH 7.6 to 8.6
  • groups of 4+
Banded gourami (striped gourami)

Banded gourami

Peaceful · Top · easy care

  • 4 in adult
  • 30+ gal
  • 72–82 °F
  • pH 6 to 8
  • alone or pair
Bandit corydoras (masked corydoras)

Bandit corydoras

Peaceful · Bottom · easy care

  • 1.9 in adult
  • 20+ gal
  • 72–79 °F
  • pH 6 to 7
  • groups of 6+
Black moor

Black moor

Peaceful · All levels · easy care

  • 6 in adult
  • 30+ gal
  • 64–74 °F
  • pH 7 to 8
  • groups of 2+
Black phantom tetra

Black phantom tetra

Peaceful · Middle · easy care

  • 1.8 in adult
  • 15+ gal
  • 72–82 °F
  • pH 6 to 7.5
  • groups of 6+
Black ruby barb

Black ruby barb

Peaceful · Middle · easy care

  • 3 in adult
  • 29+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 6+
Black skirt tetra

Black skirt tetra

Peaceful · Middle · easy care

  • 3 in adult
  • 20+ gal
  • 72–82 °F
  • pH 6 to 8
  • groups of 6+
Black-barred limia (humpbacked limia)

Black-barred limia

Peaceful · Middle · moderate care

  • 2 in adult
  • 20+ gal
  • 75–79 °F
  • pH 7 to 8.5
  • groups of 5+
Bleeding heart tetra

Bleeding heart tetra

Peaceful · Middle · easy care

  • 2.4 in adult
  • 20+ gal
  • 72–80 °F
  • pH 5.5 to 7.5
  • groups of 6+
Blind cave tetra

Blind cave tetra

Semi-aggressive · Middle · easy care

  • 4.7 in adult
  • 29+ gal
  • 68–77 °F
  • pH 6.5 to 8
  • groups of 6+
Blood parrot cichlid

Blood parrot cichlid

Semi-aggressive · Middle · moderate care

  • 8 in adult
  • 55+ gal
  • 76–80 °F
  • pH 6.5 to 7.5
  • alone or pair
Bloodfin tetra

Bloodfin tetra

Peaceful · Top · easy care

  • 2.2 in adult
  • 20+ gal
  • 65–82 °F
  • pH 6 to 8
  • groups of 6+
Blue acara

Blue acara

Semi-aggressive · Middle · easy care

  • 6 in adult
  • 40+ gal
  • 72–82 °F
  • pH 6.5 to 8
  • alone or pair
Blue dolphin cichlid

Blue dolphin cichlid

Semi-aggressive · Middle · moderate care

  • 7.9 in adult
  • 75+ gal
  • 75–78 °F
  • pH 7.5 to 8.5
  • groups of 4+
Bolivian ram

Bolivian ram

Peaceful · Bottom · easy care

  • 3.2 in adult
  • 29+ gal
  • 72–80 °F
  • pH 6 to 8
  • alone or pair
Brilliant rasbora

Brilliant rasbora

Peaceful · Middle · easy care

  • 2 in adult
  • 20+ gal
  • 72–79 °F
  • pH 5.5 to 7
  • groups of 8+
Bubble eye goldfish

Bubble eye goldfish

Peaceful · All levels · demanding care

  • 4 in adult
  • 30+ gal
  • 65–74 °F
  • pH 7 to 8
  • groups of 2+
Buenos Aires tetra

Buenos Aires tetra

Semi-aggressive · Middle · easy care

  • 3 in adult
  • 29+ gal
  • 64–82 °F
  • pH 6 to 8
  • groups of 6+
Bumblebee catfish

Bumblebee catfish

Peaceful · Bottom · easy care

  • 2.4 in adult
  • 20+ gal
  • 70–77 °F
  • pH 6 to 7.5
  • alone or pair
Bumblebee cichlid (hornet cichlid)

Bumblebee cichlid

Aggressive · Middle · moderate care

  • 6.3 in adult
  • 75+ gal
  • 76–82 °F
  • pH 7.5 to 8.5
  • groups of 4+
Butterfly goodeid (butterfly splitfin)

Butterfly goodeid

Semi-aggressive · Middle · easy care

  • 4 in adult
  • 30+ gal
  • 70–75 °F
  • pH 7 to 8
  • groups of 6+
Butterfly pleco (L168)

Butterfly pleco

Peaceful · Bottom · moderate care

  • 5.1 in adult
  • 30+ gal
  • 77–84 °F
  • pH 6 to 7.5
  • alone or pair
Candy-striped pleco (L015)

Candy-striped pleco

Peaceful · Bottom · moderate care

  • 5.9 in adult
  • 30+ gal
  • 72–79 °F
  • pH 6 to 7
  • alone or pair
Celebes rainbowfish

Celebes rainbowfish

Peaceful · Top · moderate care

  • 3 in adult
  • 29+ gal
  • 68–82 °F
  • pH 7 to 8
  • groups of 6+
Checker barb

Checker barb

Peaceful · Middle · easy care

  • 2 in adult
  • 20+ gal
  • 64–77 °F
  • pH 5.5 to 7.5
  • groups of 6+
Chinese algae eater

Chinese algae eater

Semi-aggressive · Bottom · easy care

  • 11 in adult
  • 75+ gal
  • 72–82 °F
  • pH 6 to 8
  • alone or pair
Chocolate gourami

Chocolate gourami

Peaceful · Middle · demanding care

  • 2.4 in adult
  • 20+ gal
  • 77–81 °F
  • pH 5 to 6.5
  • alone or pair

Clown barb

Peaceful · Middle · easy care

  • 5.9 in adult
  • 55+ gal
  • 75–82 °F
  • pH 6 to 7.5
  • groups of 6+
Clown killifish

Clown killifish

Peaceful · Top · moderate care

  • 1.4 in adult
  • 5+ gal
  • 72–80 °F
  • pH 5.5 to 7
  • groups of 4+

Clown pleco

Peaceful · Bottom · easy care

  • 3.5 in adult
  • 20+ gal
  • 73–82 °F
  • pH 6.5 to 7.5
  • alone or pair
Colombian tetra

Colombian tetra

Peaceful · Middle · easy care

  • 2.6 in adult
  • 30+ gal
  • 75–79 °F
  • pH 6 to 7.5
  • groups of 6+
Comet goldfish

Comet goldfish

Peaceful · All levels · easy care

  • 10 in adult
  • 75+ gal
  • 50–75 °F
  • pH 7 to 8
  • groups of 2+
Common goldfish

Common goldfish

Peaceful · All levels · easy care

  • 8.7 in adult
  • 75+ gal
  • 50–75 °F
  • pH 7 to 8
  • groups of 2+
Congo tetra

Congo tetra

Peaceful · Middle · moderate care

  • 3 in adult
  • 29+ gal
  • 73–81 °F
  • pH 6 to 7.5
  • groups of 6+
Convict cichlid

Convict cichlid

Aggressive · Bottom · easy care

  • 4.7 in adult
  • 29+ gal
  • 72–82 °F
  • pH 6.5 to 8
  • alone or pair
Convict julie

Convict julie

Semi-aggressive · Bottom · easy care

  • 5.1 in adult
  • 30+ gal
  • 75–80 °F
  • pH 7.5 to 9
  • groups of 2+
Coral red pencilfish

Coral red pencilfish

Peaceful · Middle · moderate care

  • 1.1 in adult
  • 10+ gal
  • 75–82 °F
  • pH 5 to 7
  • groups of 8+
Croaking gourami

Croaking gourami

Peaceful · Top · moderate care

  • 2.8 in adult
  • 15+ gal
  • 72–82 °F
  • pH 6 to 7.5
  • groups of 3+
Cuckoo catfish

Cuckoo catfish

Peaceful · Bottom · moderate care

  • 6 in adult
  • 55+ gal
  • 75–81 °F
  • pH 7.5 to 9
  • groups of 4+
Demasoni cichlid

Demasoni cichlid

Aggressive · Bottom · moderate care

  • 3.9 in adult
  • 55+ gal
  • 76–82 °F
  • pH 7.5 to 8.5
  • groups of 12+
Denison barb (roseline shark)

Denison barb

Peaceful · Middle · moderate care

  • 6 in adult
  • 55+ gal
  • 64–77 °F
  • pH 6.8 to 7.8
  • groups of 6+
Diamond tetra

Diamond tetra

Peaceful · Middle · easy care

  • 2.4 in adult
  • 20+ gal
  • 72–82 °F
  • pH 5.5 to 7.5
  • groups of 6+
Discus

Discus

Peaceful · Middle · demanding care

  • 8 in adult
  • 55+ gal
  • 82–88 °F
  • pH 5 to 7
  • groups of 5+
Dojo loach (weather loach)

Dojo loach

Peaceful · Bottom · easy care

  • 10 in adult
  • 55+ gal
  • 55–77 °F
  • pH 6.5 to 8
  • groups of 3+
Dwarf chain loach

Dwarf chain loach

Peaceful · Bottom · moderate care

  • 2.5 in adult
  • 20+ gal
  • 75–82 °F
  • pH 6.5 to 7.5
  • groups of 6+
Dwarf corydoras

Dwarf corydoras

Peaceful · Middle · moderate care

  • 1.4 in adult
  • 10+ gal
  • 68–82 °F
  • pH 6 to 7.5
  • groups of 8+
Dwarf pencilfish

Dwarf pencilfish

Peaceful · Middle · moderate care

  • 1.4 in adult
  • 10+ gal
  • 75–82 °F
  • pH 5.5 to 7.5
  • groups of 6+
Dwarf rasbora (spotted rasbora)

Dwarf rasbora

Peaceful · Middle · moderate care

  • 1 in adult
  • 5+ gal
  • 75–82 °F
  • pH 5 to 7
  • groups of 8+
Electric blue acara

Electric blue acara

Semi-aggressive · Middle · easy care

  • 6 in adult
  • 40+ gal
  • 72–82 °F
  • pH 6.5 to 8
  • alone or pair
Electric blue hap

Electric blue hap

Semi-aggressive · Middle · moderate care

  • 4.5 in adult
  • 75+ gal
  • 76–82 °F
  • pH 7.5 to 8.5
  • groups of 3+
Elephantnose fish

Elephantnose fish

Peaceful · Bottom · demanding care

  • 9 in adult
  • 55+ gal
  • 77–82 °F
  • pH 6.5 to 7.5
  • alone or pair
Emerald corydoras

Emerald corydoras

Peaceful · Bottom · easy care

  • 3 in adult
  • 29+ gal
  • 72–82 °F
  • pH 5.8 to 8
  • groups of 6+
Emperor tetra

Emperor tetra

Peaceful · Middle · easy care

  • 2 in adult
  • 20+ gal
  • 73–81 °F
  • pH 6 to 7.5
  • groups of 6+
Fairy cichlid (princess of Burundi)

Fairy cichlid

Semi-aggressive · Middle · easy care

  • 3.5 in adult
  • 30+ gal
  • 75–81 °F
  • pH 7.8 to 9
  • groups of 2+
Fantail goldfish

Fantail goldfish

Peaceful · All levels · easy care

  • 8 in adult
  • 30+ gal
  • 64–74 °F
  • pH 7 to 8
  • groups of 2+
Featherfin squeaker

Featherfin squeaker

Semi-aggressive · Bottom · easy care

  • 11.8 in adult
  • 75+ gal
  • 72–79 °F
  • pH 6.5 to 8
  • alone or pair
Festivum (flag cichlid)

Festivum

Semi-aggressive · Middle · moderate care

  • 4.8 in adult
  • 55+ gal
  • 75–84 °F
  • pH 6 to 7.5
  • alone or pair
Firemouth cichlid

Firemouth cichlid

Semi-aggressive · Bottom · easy care

  • 6 in adult
  • 40+ gal
  • 75–84 °F
  • pH 6.5 to 8
  • alone or pair
Five-banded barb

Five-banded barb

Peaceful · Middle · moderate care

  • 3.5 in adult
  • 29+ gal
  • 74–84 °F
  • pH 5 to 7
  • groups of 5+
Flame tetra

Flame tetra

Peaceful · Middle · easy care

  • 1 in adult
  • 10+ gal
  • 72–82 °F
  • pH 6 to 7.5
  • groups of 6+
Flowerhorn cichlid

Flowerhorn cichlid

Aggressive · Middle · easy care

  • 14 in adult
  • 75+ gal
  • 78–84 °F
  • pH 7 to 8
  • one per tank
Flying fox

Flying fox

Semi-aggressive · Bottom · easy care

  • 6 in adult
  • 40+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • one per tank
Gardneri killifish

Gardneri killifish

Semi-aggressive · Top · easy care

  • 2.6 in adult
  • 10+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 3+
Giant danio

Giant danio

Semi-aggressive · Top · easy care

  • 6 in adult
  • 55+ gal
  • 72–79 °F
  • pH 6 to 8
  • groups of 6+
Glass catfish

Glass catfish

Peaceful · Middle · moderate care

  • 3 in adult
  • 29+ gal
  • 75–82 °F
  • pH 6.5 to 7.5
  • groups of 6+
GloFish danio

GloFish danio

Peaceful · Top · easy care

  • 2 in adult
  • 10+ gal
  • 64–77 °F
  • pH 6.5 to 8
  • groups of 6+
GloFish tetra

GloFish tetra

Peaceful · Middle · easy care

  • 3 in adult
  • 20+ gal
  • 72–82 °F
  • pH 6 to 8
  • groups of 6+
Glowlight danio

Glowlight danio

Peaceful · Middle · easy care

  • 1.5 in adult
  • 15+ gal
  • 66–75 °F
  • pH 6 to 7.5
  • groups of 6+
Gold barb

Gold barb

Peaceful · Middle · easy care

  • 2.8 in adult
  • 20+ gal
  • 64–75 °F
  • pH 6 to 8
  • groups of 6+
Gold nugget pleco

Gold nugget pleco

Peaceful · Bottom · moderate care

  • 8.8 in adult
  • 75+ gal
  • 77–86 °F
  • pH 6.5 to 7.5
  • alone or pair
Golden dwarf cichlid

Golden dwarf cichlid

Semi-aggressive · Bottom · easy care

  • 2.2 in adult
  • 20+ gal
  • 72–80 °F
  • pH 6 to 7.5
  • alone or pair

Golden pencilfish

Peaceful · Top · moderate care

  • 2.6 in adult
  • 15+ gal
  • 75–82 °F
  • pH 5.5 to 7.5
  • groups of 6+
Green neon tetra

Green neon tetra

Peaceful · Middle · moderate care

  • 1 in adult
  • 10+ gal
  • 75–82 °F
  • pH 5 to 6.5
  • groups of 8+
Green phantom pleco (L200)

Green phantom pleco

Peaceful · Bottom · moderate care

  • 5.9 in adult
  • 40+ gal
  • 77–84 °F
  • pH 6 to 7.5
  • alone or pair
Green terror

Green terror

Aggressive · Middle · moderate care

  • 12 in adult
  • 75+ gal
  • 70–79 °F
  • pH 6.5 to 8
  • alone or pair
Indian glassfish

Indian glassfish

Peaceful · Middle · moderate care

  • 3.1 in adult
  • 20+ gal
  • 72–82 °F
  • pH 7 to 8
  • groups of 6+
Jack Dempsey

Jack Dempsey

Aggressive · Bottom · moderate care

  • 10 in adult
  • 75+ gal
  • 72–82 °F
  • pH 6.5 to 8
  • alone or pair
Jewel cichlid

Jewel cichlid

Aggressive · Bottom · easy care

  • 6 in adult
  • 40+ gal
  • 72–82 °F
  • pH 6.5 to 8
  • alone or pair
Julii corydoras

Julii corydoras

Peaceful · Bottom · easy care

  • 2.5 in adult
  • 20+ gal
  • 72–79 °F
  • pH 6 to 8
  • groups of 6+
Kenyi cichlid

Kenyi cichlid

Aggressive · Bottom · moderate care

  • 5 in adult
  • 55+ gal
  • 76–82 °F
  • pH 7.5 to 8.5
  • groups of 4+
Kerri tetra (royal tetra)

Kerri tetra

Peaceful · Middle · easy care

  • 1.1 in adult
  • 20+ gal
  • 75–81 °F
  • pH 6 to 7.5
  • groups of 6+
Keyhole cichlid

Keyhole cichlid

Peaceful · Middle · easy care

  • 4 in adult
  • 30+ gal
  • 72–80 °F
  • pH 6 to 7.5
  • alone or pair
Kissing gourami

Kissing gourami

Semi-aggressive · Middle · easy care

  • 12 in adult
  • 75+ gal
  • 72–82 °F
  • pH 6.8 to 8.5
  • alone or pair
Kubotai loach (polka dot loach)

Kubotai loach

Peaceful · Bottom · moderate care

  • 5.9 in adult
  • 40+ gal
  • 77–86 °F
  • pH 6 to 7.5
  • groups of 5+
Kubotai rasbora

Kubotai rasbora

Peaceful · Middle · easy care

  • 0.8 in adult
  • 10+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 8+
Lambchop rasbora

Lambchop rasbora

Peaceful · Middle · easy care

  • 1.2 in adult
  • 10+ gal
  • 73–82 °F
  • pH 6 to 7.5
  • groups of 8+
Least killifish

Least killifish

Peaceful · Middle · easy care

  • 1.2 in adult
  • 5+ gal
  • 64–80 °F
  • pH 7 to 8
  • groups of 6+
Lemon tetra

Lemon tetra

Peaceful · Middle · easy care

  • 2 in adult
  • 20+ gal
  • 72–82 °F
  • pH 5.5 to 8
  • groups of 6+
Leopard frog pleco (L134)

Leopard frog pleco

Peaceful · Bottom · moderate care

  • 2.4 in adult
  • 20+ gal
  • 77–84 °F
  • pH 6 to 7.5
  • alone or pair
Lionhead goldfish

Lionhead goldfish

Peaceful · All levels · moderate care

  • 6 in adult
  • 30+ gal
  • 64–74 °F
  • pH 7 to 8
  • groups of 2+
Lyretail killifish

Lyretail killifish

Peaceful · Top · moderate care

  • 2.4 in adult
  • 10+ gal
  • 70–79 °F
  • pH 5.5 to 7
  • groups of 3+
Marbled hatchetfish

Marbled hatchetfish

Peaceful · Top · moderate care

  • 1.5 in adult
  • 20+ gal
  • 75–82 °F
  • pH 5.5 to 7
  • groups of 6+
Medaka (rice fish)

Medaka

Peaceful · Top · easy care

  • 1.5 in adult
  • 10+ gal
  • 65–82 °F
  • pH 6.5 to 8
  • groups of 6+
Moonlight gourami

Moonlight gourami

Peaceful · Top · easy care

  • 5 in adult
  • 30+ gal
  • 77–84 °F
  • pH 6 to 7.5
  • one male per tank
Odessa barb

Odessa barb

Peaceful · Middle · easy care

  • 2.5 in adult
  • 29+ gal
  • 68–79 °F
  • pH 6 to 8
  • groups of 6+
Oranda

Oranda

Peaceful · All levels · easy care

  • 8 in adult
  • 30+ gal
  • 64–74 °F
  • pH 7 to 8
  • groups of 2+
Oscar

Oscar

Aggressive · Middle · moderate care

  • 14 in adult
  • 75+ gal
  • 72–80 °F
  • pH 6 to 8
  • alone or pair
Paradise fish

Paradise fish

Semi-aggressive · Top · easy care

  • 3.5 in adult
  • 20+ gal
  • 61–79 °F
  • pH 6 to 8
  • one male per tank
Peacock cichlid

Peacock cichlid

Semi-aggressive · Bottom · moderate care

  • 6 in adult
  • 55+ gal
  • 75–82 °F
  • pH 7.5 to 8.6
  • one male per tank
Peacock eel

Peacock eel

Peaceful · Bottom · moderate care

  • 12 in adult
  • 55+ gal
  • 73–82 °F
  • pH 6.5 to 7.5
  • alone or pair
Peacock gudgeon

Peacock gudgeon

Peaceful · Bottom · easy care

  • 3 in adult
  • 15+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 4+
Pearl danio

Pearl danio

Peaceful · Top · easy care

  • 2.6 in adult
  • 20+ gal
  • 68–77 °F
  • pH 6 to 8
  • groups of 6+
Pearlscale goldfish

Pearlscale goldfish

Peaceful · All levels · moderate care

  • 8 in adult
  • 30+ gal
  • 65–74 °F
  • pH 7 to 8
  • groups of 2+
Penguin tetra

Penguin tetra

Peaceful · Middle · easy care

  • 2.4 in adult
  • 20+ gal
  • 72–82 °F
  • pH 6 to 7.5
  • groups of 6+
Peppered corydoras

Peppered corydoras

Peaceful · Bottom · easy care

  • 2.8 in adult
  • 20+ gal
  • 64–77 °F
  • pH 6 to 8
  • groups of 6+
Petricola catfish (Synodontis petricola)

Petricola catfish

Peaceful · Bottom · easy care

  • 4.5 in adult
  • 30+ gal
  • 73–79 °F
  • pH 7.5 to 9
  • groups of 3+
Phoenix rasbora

Phoenix rasbora

Peaceful · Middle · moderate care

  • 0.8 in adult
  • 5+ gal
  • 74–82 °F
  • pH 5 to 7
  • groups of 8+
Pictus catfish

Pictus catfish

Peaceful · Bottom · easy care

  • 4.3 in adult
  • 55+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 3+
Pitbull pleco

Pitbull pleco

Peaceful · Bottom · moderate care

  • 1.6 in adult
  • 20+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 3+
Rainbow cichlid

Rainbow cichlid

Semi-aggressive · Middle · easy care

  • 6 in adult
  • 30+ gal
  • 72–84 °F
  • pH 7 to 8
  • alone or pair
Rainbow shark

Rainbow shark

Semi-aggressive · Bottom · easy care

  • 6 in adult
  • 55+ gal
  • 72–80 °F
  • pH 6.5 to 7.5
  • one per tank
Rainbow shiner

Rainbow shiner

Peaceful · Middle · easy care

  • 3 in adult
  • 30+ gal
  • 60–75 °F
  • pH 6.5 to 8
  • groups of 6+
Ranchu goldfish

Ranchu goldfish

Peaceful · All levels · moderate care

  • 8 in adult
  • 30+ gal
  • 65–74 °F
  • pH 7 to 8
  • groups of 2+
Red devil cichlid

Red devil cichlid

Aggressive · Middle · moderate care

  • 12 in adult
  • 75+ gal
  • 75–82 °F
  • pH 7 to 8
  • one per tank
Red eye tetra

Red eye tetra

Peaceful · Middle · easy care

  • 2.8 in adult
  • 29+ gal
  • 73–82 °F
  • pH 6 to 8
  • groups of 6+

Red neon blue-eye

Peaceful · Top · moderate care

  • 1.2 in adult
  • 10+ gal
  • 74–82 °F
  • pH 6 to 7.5
  • groups of 6+
Red phantom tetra

Red phantom tetra

Peaceful · Middle · moderate care

  • 1.3 in adult
  • 15+ gal
  • 68–77 °F
  • pH 5.5 to 7.5
  • groups of 6+
Red rainbowfish

Red rainbowfish

Peaceful · Middle · easy care

  • 5.9 in adult
  • 55+ gal
  • 72–79 °F
  • pH 7 to 8
  • groups of 6+
Red zebra cichlid

Red zebra cichlid

Aggressive · Bottom · easy care

  • 5 in adult
  • 55+ gal
  • 72–82 °F
  • pH 7.5 to 8.5
  • groups of 3+
Red-tail dwarf puffer

Red-tail dwarf puffer

Aggressive · All levels · moderate care

  • 1.7 in adult
  • 15+ gal
  • 75–82 °F
  • pH 6 to 7.5
  • one male per tank
Red-tail shark

Red-tail shark

Semi-aggressive · Bottom · easy care

  • 6 in adult
  • 55+ gal
  • 72–79 °F
  • pH 6.5 to 7.5
  • one per tank
Ropefish

Ropefish

Peaceful · Bottom · moderate care

  • 15 in adult
  • 55+ gal
  • 75–82 °F
  • pH 6.5 to 7.5
  • alone or pair
Rosy barb

Rosy barb

Peaceful · Middle · easy care

  • 6 in adult
  • 29+ gal
  • 64–77 °F
  • pH 6 to 8
  • groups of 6+
Rosy tetra

Rosy tetra

Peaceful · Middle · easy care

  • 1.3 in adult
  • 15+ gal
  • 75–82 °F
  • pH 6 to 7.5
  • groups of 6+
Rubbernose pleco (bulldog pleco)

Rubbernose pleco

Peaceful · Bottom · moderate care

  • 5.7 in adult
  • 30+ gal
  • 68–77 °F
  • pH 6.5 to 7.5
  • alone or pair
Ruby tetra

Ruby tetra

Peaceful · Middle · moderate care

  • 1 in adult
  • 10+ gal
  • 72–80 °F
  • pH 5 to 7
  • groups of 8+
Rusty cichlid

Rusty cichlid

Semi-aggressive · Middle · easy care

  • 4.3 in adult
  • 40+ gal
  • 75–79 °F
  • pH 7.5 to 8.5
  • groups of 4+
Ryukin

Ryukin

Peaceful · All levels · easy care

  • 8 in adult
  • 30+ gal
  • 64–74 °F
  • pH 7 to 8
  • groups of 2+
Sailfin molly

Sailfin molly

Peaceful · Middle · easy care

  • 5.9 in adult
  • 30+ gal
  • 72–82 °F
  • pH 7.5 to 8.5
  • groups of 3+
Salvini cichlid

Salvini cichlid

Aggressive · Middle · moderate care

  • 5.9 in adult
  • 40+ gal
  • 72–81 °F
  • pH 7 to 8
  • alone or pair
Saulosi cichlid

Saulosi cichlid

Semi-aggressive · Bottom · moderate care

  • 3.4 in adult
  • 40+ gal
  • 76–82 °F
  • pH 7.5 to 8.5
  • groups of 6+
Scarlet badis

Scarlet badis

Peaceful · Bottom · moderate care

  • 0.8 in adult
  • 10+ gal
  • 72–79 °F
  • pH 6.5 to 7.8
  • one male per tank
Scissortail rasbora

Scissortail rasbora

Peaceful · Middle · easy care

  • 6 in adult
  • 40+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 6+
Senegal bichir

Senegal bichir

Semi-aggressive · Bottom · easy care

  • 14 in adult
  • 75+ gal
  • 75–84 °F
  • pH 6.5 to 7.5
  • alone or pair
Serpae tetra

Serpae tetra

Semi-aggressive · Middle · easy care

  • 1.6 in adult
  • 20+ gal
  • 72–79 °F
  • pH 5.5 to 7.5
  • groups of 6+
Severum

Severum

Semi-aggressive · Middle · easy care

  • 8 in adult
  • 55+ gal
  • 75–84 °F
  • pH 6 to 7.5
  • alone or pair
Shell-dweller cichlid

Shell-dweller cichlid

Semi-aggressive · Bottom · moderate care

  • 2 in adult
  • 10+ gal
  • 75–80 °F
  • pH 7.5 to 9
  • groups of 3+
Shubunkin

Shubunkin

Peaceful · All levels · easy care

  • 12 in adult
  • 75+ gal
  • 50–75 °F
  • pH 7 to 8
  • groups of 2+
Siamese algae eater

Siamese algae eater

Peaceful · Bottom · easy care

  • 6 in adult
  • 29+ gal
  • 72–80 °F
  • pH 6.5 to 7.5
  • alone or pair
Silver dollar

Silver dollar

Peaceful · Middle · easy care

  • 6 in adult
  • 75+ gal
  • 75–82 °F
  • pH 5.5 to 7.5
  • groups of 5+
Silvertip tetra

Silvertip tetra

Peaceful · Middle · easy care

  • 2 in adult
  • 20+ gal
  • 72–82 °F
  • pH 6 to 8
  • groups of 6+

Snowball pleco

Peaceful · Bottom · moderate care

  • 5 in adult
  • 30+ gal
  • 77–84 °F
  • pH 6 to 7.5
  • alone or pair
Sparkling gourami

Sparkling gourami

Peaceful · Top · moderate care

  • 1.6 in adult
  • 10+ gal
  • 76–82 °F
  • pH 6 to 7.5
  • alone or pair
Spotted blue-eye

Spotted blue-eye

Peaceful · Top · moderate care

  • 1 in adult
  • 10+ gal
  • 75–82 °F
  • pH 5.5 to 7.5
  • groups of 6+
Sterbai corydoras

Sterbai corydoras

Peaceful · Bottom · easy care

  • 2.6 in adult
  • 20+ gal
  • 74–82 °F
  • pH 6 to 7.6
  • groups of 6+
Texas cichlid

Texas cichlid

Aggressive · Middle · moderate care

  • 12 in adult
  • 75+ gal
  • 68–82 °F
  • pH 6.5 to 8
  • alone or pair
Thick-lipped gourami

Thick-lipped gourami

Peaceful · Top · easy care

  • 3.5 in adult
  • 20+ gal
  • 72–82 °F
  • pH 6 to 7.5
  • alone or pair
Threadfin rainbowfish

Threadfin rainbowfish

Peaceful · Middle · moderate care

  • 2 in adult
  • 20+ gal
  • 73–84 °F
  • pH 6 to 7
  • groups of 6+
Twig catfish

Twig catfish

Peaceful · Bottom · demanding care

  • 8.9 in adult
  • 30+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • alone or pair
Uaru (triangle cichlid)

Uaru

Semi-aggressive · Middle · moderate care

  • 9.8 in adult
  • 75+ gal
  • 79–86 °F
  • pH 5.5 to 7
  • groups of 2+
Umbrella dwarf cichlid (A. borellii)

Umbrella dwarf cichlid

Semi-aggressive · Bottom · moderate care

  • 1.5 in adult
  • 15+ gal
  • 70–79 °F
  • pH 6 to 7.5
  • alone or pair
Upside-down catfish

Upside-down catfish

Peaceful · Middle · easy care

  • 4 in adult
  • 29+ gal
  • 72–79 °F
  • pH 6 to 7.5
  • groups of 3+
Variatus platy

Variatus platy

Peaceful · Middle · easy care

  • 2.8 in adult
  • 15+ gal
  • 61–75 °F
  • pH 7 to 8.2
  • groups of 3+
Wrestling halfbeak

Wrestling halfbeak

Peaceful · Top · moderate care

  • 2.8 in adult
  • 20+ gal
  • 72–82 °F
  • pH 6.5 to 8
  • groups of 3+
X-ray tetra

X-ray tetra

Peaceful · Middle · easy care

  • 1.8 in adult
  • 15+ gal
  • 75–82 °F
  • pH 6 to 8
  • groups of 6+
Yellow lab cichlid

Yellow lab cichlid

Semi-aggressive · Middle · easy care

  • 6 in adult
  • 55+ gal
  • 72–82 °F
  • pH 7.5 to 8.5
  • groups of 4+
Yoyo loach

Yoyo loach

Peaceful · Bottom · moderate care

  • 6 in adult
  • 40+ gal
  • 75–82 °F
  • pH 6 to 7.5
  • groups of 5+
Zebra loach

Zebra loach

Peaceful · Bottom · easy care

  • 4 in adult
  • 29+ gal
  • 73–79 °F
  • pH 6 to 7.5
  • groups of 5+
Zebra pleco

Zebra pleco

Peaceful · Bottom · demanding care

  • 3.2 in adult
  • 20+ gal
  • 79–86 °F
  • pH 6.5 to 7.5
  • alone or pair
Zig-zag eel

Zig-zag eel

Semi-aggressive · Bottom · moderate care

  • 20 in adult
  • 55+ gal
  • 72–82 °F
  • pH 6.5 to 7.5
  • one per tank
Cherry shrimp

Cherry shrimp

Peaceful · Bottom · easy care

  • 1.6 in adult
  • 5+ gal
  • 65–82 °F
  • pH 6.5 to 8
  • groups of 10+
Amano shrimp

Amano shrimp

Peaceful · Bottom · easy care

  • 2 in adult
  • 10+ gal
  • 68–80 °F
  • pH 6.5 to 7.5
  • groups of 3+
Zebra nerite snail

Zebra nerite snail

Peaceful · Bottom · easy care

  • 1 in adult
  • 5+ gal
  • 70–80 °F
  • pH 7 to 8.5
  • alone or pair
Mystery snail

Mystery snail

Peaceful · Bottom · easy care

  • 2 in adult
  • 10+ gal
  • 68–82 °F
  • pH 7 to 8
  • alone or pair
African dwarf frog

African dwarf frog

Peaceful · All levels · moderate care

  • 1.5 in adult
  • 10+ gal
  • 75–82 °F
  • pH 6.5 to 8
  • groups of 2+
Assassin snail

Assassin snail

Peaceful · Bottom · easy care

  • 1 in adult
  • 5+ gal
  • 72–80 °F
  • pH 7 to 8
  • alone or pair
Axolotl

Axolotl

Peaceful · Bottom · moderate care

  • 9 in adult
  • 20+ gal
  • 60–68 °F
  • pH 6.5 to 8
  • alone or pair
Bamboo shrimp

Bamboo shrimp

Peaceful · Bottom · moderate care

  • 3 in adult
  • 20+ gal
  • 72–82 °F
  • pH 6.5 to 7.5
  • alone or pair
Bladder snail

Bladder snail

Peaceful · Bottom · easy care

  • 0.6 in adult
  • 5+ gal
  • 64–82 °F
  • pH 7 to 8.5
  • alone or pair
Crystal red shrimp

Crystal red shrimp

Peaceful · Bottom · demanding care

  • 1.2 in adult
  • 10+ gal
  • 62–76 °F
  • pH 5.8 to 7.4
  • groups of 10+
Dwarf orange crayfish (CPO)

Dwarf orange crayfish

Semi-aggressive · Bottom · easy care

  • 2 in adult
  • 10+ gal
  • 60–77 °F
  • pH 7 to 8
  • alone or pair
Ghost shrimp

Ghost shrimp

Peaceful · Bottom · easy care

  • 2 in adult
  • 5+ gal
  • 65–80 °F
  • pH 7 to 8
  • groups of 3+
Horned nerite snail

Horned nerite snail

Peaceful · Bottom · easy care

  • 0.5 in adult
  • 5+ gal
  • 72–80 °F
  • pH 7 to 8.5
  • alone or pair

Rabbit snail

Peaceful · Bottom · moderate care

  • 3 in adult
  • 20+ gal
  • 76–84 °F
  • pH 7.3 to 8.5
  • alone or pair
Ramshorn snail

Ramshorn snail

Peaceful · Bottom · easy care

  • 1 in adult
  • 5+ gal
  • 64–82 °F
  • pH 7 to 8
  • alone or pair
Thai micro crab

Thai micro crab

Peaceful · Bottom · moderate care

  • 1 in adult
  • 5+ gal
  • 70–82 °F
  • pH 6.5 to 7.3
  • groups of 3+
Vampire shrimp

Vampire shrimp

Peaceful · Bottom · moderate care

  • 6 in adult
  • 29+ gal
  • 74–84 °F
  • pH 6.5 to 7.8
  • alone or pair

More fish lists

Names, and adult sizes where the article gives one, are checked against Wikipedia; care ranges are common hobby guidance, and each species page says which is which. 213 of these 233 are fish. Photos are real photographs from Wikimedia Commons, credited below; the lineup is our own drawing at one scale.

Photo credits

Real photographs from Wikimedia Commons, resized and cropped to fit; each is used under the license named.