Aquarium fish species
From popular guppies and bettas to rare bichirs — profiles with verified care parameters, photos, and compatibility data.

Neon Tetra
BeginnerParacheirodon innesi
- Tank volume:
- from 60 L
- Maximum size:
- up to 4 cm
- Temperature:
- 20–26 °C
- pH:
- 5–7

Betta
BeginnerBetta splendens
- Tank volume:
- from 20 L
- Maximum size:
- up to 6.5 cm
- Temperature:
- 24–28 °C
- pH:
- 6.5–7.5

Guppy
BeginnerPoecilia reticulata
- Tank volume:
- from 40 L
- Maximum size:
- up to 5 cm
- Temperature:
- 22–28 °C
- pH:
- 7–8

Bronze Corydoras
BeginnerCorydoras aeneus
- Tank volume:
- from 80 L
- Maximum size:
- up to 7.5 cm
- Temperature:
- 22–28 °C
- pH:
- 6–7.5
Freshwater Angelfish
IntermediatePterophyllum scalare
- Tank volume:
- from 200 L
- Maximum size:
- up to 15 cm
- Temperature:
- 24–30 °C
- pH:
- 6–7.5

Discus
ExpertSymphysodon aequifasciatus
- Tank volume:
- from 250 L
- Maximum size:
- up to 17 cm
- Temperature:
- 28–30 °C
- pH:
- 5.5–7
Zebra Danio
BeginnerDanio rerio
- Tank volume:
- from 60 L
- Maximum size:
- up to 5 cm
- Temperature:
- 18–25 °C
- pH:
- 6.5–8

Common Pleco
IntermediateHypostomus plecostomus
- Tank volume:
- from 380 L
- Maximum size:
- up to 30 cm
- Temperature:
- 22–26 °C
- pH:
- 6.5–7.5
Goldfish
IntermediateCarassius auratus
- Tank volume:
- from 150 L
- Maximum size:
- up to 30 cm
- Temperature:
- 18–22 °C
- pH:
- 6.5–8

Cherry Barb
BeginnerPuntius titteya
- Tank volume:
- from 60 L
- Maximum size:
- up to 5 cm
- Temperature:
- 22–28 °C
- pH:
- 6–7.5

Cardinal Tetra
IntermediateParacheirodon axelrodi
- Tank volume:
- from 80 L
- Maximum size:
- up to 5 cm
- Temperature:
- 23–27 °C
- pH:
- 4.5–7

Black Neon Tetra
BeginnerHyphessobrycon herbertaxelrodi
- Tank volume:
- from 80 L
- Maximum size:
- up to 4 cm
- Temperature:
- 23–27 °C
- pH:
- 5.5–7.5

Rummy-nose Tetra
IntermediateHemigrammus rhodostomus
- Tank volume:
- from 100 L
- Maximum size:
- up to 5 cm
- Temperature:
- 22–27 °C
- pH:
- 5.5–7

Glowlight Tetra
BeginnerHemigrammus erythrozonus
- Tank volume:
- from 80 L
- Maximum size:
- up to 4 cm
- Temperature:
- 22–28 °C
- pH:
- 5.5–7.5

Black Phantom Tetra
BeginnerHyphessobrycon megalopterus
- Tank volume:
- from 80 L
- Maximum size:
- up to 4.5 cm
- Temperature:
- 22–28 °C
- pH:
- 5.5–7.5

Bleeding Heart Tetra
IntermediateHyphessobrycon erythrostigma
- Tank volume:
- from 120 L
- Maximum size:
- up to 8 cm
- Temperature:
- 23–28 °C
- pH:
- 5.5–7

Sailfin Molly
IntermediatePoecilia velifera
- Tank volume:
- from 150 L
- Maximum size:
- up to 15 cm
- Temperature:
- 24–28 °C
- pH:
- 7.5–8.5

Platy
BeginnerXiphophorus maculatus
- Tank volume:
- from 60 L
- Maximum size:
- up to 6 cm
- Temperature:
- 20–28 °C
- pH:
- 6.8–8

Swordtail
BeginnerXiphophorus hellerii
- Tank volume:
- from 100 L
- Maximum size:
- up to 14 cm
- Temperature:
- 18–28 °C
- pH:
- 7–8.4

Dwarf Gourami
BeginnerTrichogaster lalius
- Tank volume:
- from 60 L
- Maximum size:
- up to 9 cm
- Temperature:
- 22–28 °C
- pH:
- 6–7.5

Pearl Gourami
BeginnerTrichopodus leerii
- Tank volume:
- from 150 L
- Maximum size:
- up to 12 cm
- Temperature:
- 24–28 °C
- pH:
- 6.5–7.5

Three-spot Gourami
BeginnerTrichopodus trichopterus
- Tank volume:
- from 150 L
- Maximum size:
- up to 15 cm
- Temperature:
- 22–28 °C
- pH:
- 6–8

Honey Gourami
BeginnerTrichogaster chuna
- Tank volume:
- from 60 L
- Maximum size:
- up to 5 cm
- Temperature:
- 22–28 °C
- pH:
- 6–7.5

Tiger Barb
BeginnerPuntigrus tetrazona
- Tank volume:
- from 100 L
- Maximum size:
- up to 7 cm
- Temperature:
- 22–26 °C
- pH:
- 6–7.5

Rosy Barb
BeginnerPethia conchonius
- Tank volume:
- from 100 L
- Maximum size:
- up to 8 cm
- Temperature:
- 18–24 °C
- pH:
- 6–7.5

Bristlenose Pleco
BeginnerAncistrus cf. cirrhosus
- Tank volume:
- from 100 L
- Maximum size:
- up to 15 cm
- Temperature:
- 20–27 °C
- pH:
- 6–7.5
Otocinclus
IntermediateOtocinclus vittatus
- Tank volume:
- from 60 L
- Maximum size:
- up to 4 cm
- Temperature:
- 22–28 °C
- pH:
- 6–7.5

Kuhli Loach
IntermediatePangio kuhlii
- Tank volume:
- from 80 L
- Maximum size:
- up to 10 cm
- Temperature:
- 24–28 °C
- pH:
- 5.5–7

Glass Catfish
IntermediateKryptopterus vitreolus
- Tank volume:
- from 120 L
- Maximum size:
- up to 8 cm
- Temperature:
- 23–26 °C
- pH:
- 6–7

Boesemani Rainbowfish
IntermediateMelanotaenia boesemani
- Tank volume:
- from 200 L
- Maximum size:
- up to 11 cm
- Temperature:
- 25–30 °C
- pH:
- 7–8.5

Marbled Hatchetfish
IntermediateCarnegiella strigata
- Tank volume:
- from 100 L
- Maximum size:
- up to 3.5 cm
- Temperature:
- 24–28 °C
- pH:
- 5.5–6.5
Cockatoo Cichlid
IntermediateApistogramma cacatuoides
- Tank volume:
- from 80 L
- Maximum size:
- up to 8 cm
- Temperature:
- 24–28 °C
- pH:
- 6–7.5

Agassiz's Dwarf Cichlid
IntermediateApistogramma agassizii
- Tank volume:
- from 80 L
- Maximum size:
- up to 8 cm
- Temperature:
- 22–27 °C
- pH:
- 5–7

Ram Cichlid
IntermediateMikrogeophagus ramirezi
- Tank volume:
- from 80 L
- Maximum size:
- up to 6 cm
- Temperature:
- 26–30 °C
- pH:
- 5.5–7

Florida Flagfish
IntermediateJordanella floridae
- Tank volume:
- from 80 L
- Maximum size:
- up to 6.5 cm
- Temperature:
- 18–26 °C
- pH:
- 6.5–8

Endler's Livebearer
BeginnerPoecilia wingei
- Tank volume:
- from 40 L
- Maximum size:
- up to 4 cm
- Temperature:
- 22–28 °C
- pH:
- 7–8.5

Harlequin Rasbora
BeginnerTrigonostigma heteromorpha
- Tank volume:
- from 60 L
- Maximum size:
- up to 5 cm
- Temperature:
- 22–28 °C
- pH:
- 5–7

Chili Rasbora
IntermediateBoraras brigittae
- Tank volume:
- from 30 L
- Maximum size:
- up to 2 cm
- Temperature:
- 22–28 °C
- pH:
- 4–7

Galaxy Rasbora
IntermediateDanio margaritatus
- Tank volume:
- from 40 L
- Maximum size:
- up to 2 cm
- Temperature:
- 20–24 °C
- pH:
- 6.5–7.5

White Cloud Mountain Minnow
BeginnerTanichthys albonubes
- Tank volume:
- from 60 L
- Maximum size:
- up to 4 cm
- Temperature:
- 16–22 °C
- pH:
- 6–8

Black Ghost Knifefish
ExpertApteronotus albifrons
- Tank volume:
- from 400 L
- Maximum size:
- up to 50 cm
- Temperature:
- 23–28 °C
- pH:
- 6–7.5

Elephantnose Fish
ExpertGnathonemus petersii
- Tank volume:
- from 200 L
- Maximum size:
- up to 25 cm
- Temperature:
- 24–28 °C
- pH:
- 6–7.5

Senegal Bichir
IntermediatePolypterus senegalus
- Tank volume:
- from 200 L
- Maximum size:
- up to 30 cm
- Temperature:
- 24–28 °C
- pH:
- 6–8

Clown Killifish
IntermediateEpiplatys annulatus
- Tank volume:
- from 30 L
- Maximum size:
- up to 3.5 cm
- Temperature:
- 24–28 °C
- pH:
- 5–7

Sparkling Gourami
IntermediateTrichopsis pumila
- Tank volume:
- from 40 L
- Maximum size:
- up to 4 cm
- Temperature:
- 24–28 °C
- pH:
- 5–7

Pearl Danio
BeginnerDanio albolineatus
- Tank volume:
- from 80 L
- Maximum size:
- up to 6 cm
- Temperature:
- 18–26 °C
- pH:
- 6.5–8

Glass Bloodfin Tetra
BeginnerPrionobrama filigera
- Tank volume:
- from 80 L
- Maximum size:
- up to 6 cm
- Temperature:
- 22–28 °C
- pH:
- 6–7.5
Hillstream Loach
IntermediateSewellia lineolata
- Tank volume:
- from 100 L
- Maximum size:
- up to 7 cm
- Temperature:
- 20–24 °C
- pH:
- 6.5–7.5

Diamond Tetra
BeginnerMoenkhausia pittieri
- Tank volume:
- from 100 L
- Maximum size:
- up to 6 cm
- Temperature:
- 22–28 °C
- pH:
- 5.5–7
Gold Tetra
BeginnerHemigrammus rodwayi
- Tank volume:
- from 80 L
- Maximum size:
- up to 5 cm
- Temperature:
- 22–28 °C
- pH:
- 5.5–7.5
Oscar Fish
IntermediateAstronotus ocellatus
- Tank volume:
- from 280 L
- Maximum size:
- up to 35 cm
- Temperature:
- 22–26 °C
- pH:
- 6–7.5
Silver Arowana
ExpertOsteoglossum bicirrhosum
- Tank volume:
- from 1000 L
- Maximum size:
- up to 90 cm
- Temperature:
- 24–30 °C
- pH:
- 6–7
Congo Tetra
IntermediatePhenacogrammus interruptus
- Tank volume:
- from 150 L
- Maximum size:
- up to 8.5 cm
- Temperature:
- 22–26 °C
- pH:
- 6–7.5
Severum
IntermediateHeros severus
- Tank volume:
- from 250 L
- Maximum size:
- up to 20 cm
- Temperature:
- 24–28 °C
- pH:
- 5.5–7
Clown Loach
IntermediateChromobotia macracanthus
- Tank volume:
- from 250 L
- Maximum size:
- up to 30 cm
- Temperature:
- 25–30 °C
- pH:
- 5.5–7
Zebra Pleco
ExpertHypancistrus zebra
- Tank volume:
- from 100 L
- Maximum size:
- up to 8 cm
- Temperature:
- 26–30 °C
- pH:
- 6–7
Yoyo Loach
IntermediateBotia almorhae
- Tank volume:
- from 150 L
- Maximum size:
- up to 15 cm
- Temperature:
- 22–28 °C
- pH:
- 6.5–7.5
Siamese Algae Eater
BeginnerCrossocheilus oblongus
- Tank volume:
- from 100 L
- Maximum size:
- up to 14 cm
- Temperature:
- 24–26 °C
- pH:
- 6.5–8
Silver Dollar
IntermediateMetynnis argenteus
- Tank volume:
- from 250 L
- Maximum size:
- up to 15 cm
- Temperature:
- 24–28 °C
- pH:
- 5–7.5
Red-Tail Shark
IntermediateEpalzeorhynchos bicolor
- Tank volume:
- from 150 L
- Maximum size:
- up to 12 cm
- Temperature:
- 22–26 °C
- pH:
- 6.5–7.5
Rainbow Shark
IntermediateEpalzeorhynchos frenatum
- Tank volume:
- from 200 L
- Maximum size:
- up to 15 cm
- Temperature:
- 24–27 °C
- pH:
- 6.5–7.5
Denison's Barb
ExpertSahyadria denisonii
- Tank volume:
- from 200 L
- Maximum size:
- up to 15 cm
- Temperature:
- 18–25 °C
- pH:
- 6.5–7.8
Flying Fox
IntermediateEpalzeorhynchos kalopterus
- Tank volume:
- from 150 L
- Maximum size:
- up to 16 cm
- Temperature:
- 23–27 °C
- pH:
- 6–7.5
Paradise Fish
BeginnerMacropodus opercularis
- Tank volume:
- from 60 L
- Maximum size:
- up to 10 cm
- Temperature:
- 16–26 °C
- pH:
- 6–8
Peacock Cichlid
ExpertAulonocara nyassae
- Tank volume:
- from 200 L
- Maximum size:
- up to 15 cm
- Temperature:
- 24–28 °C
- pH:
- 7.7–8.6
Mosquito Fish
BeginnerGambusia affinis
- Tank volume:
- from 60 L
- Maximum size:
- up to 7 cm
- Temperature:
- 10–30 °C
- pH:
- 6.5–8.5
Butterfly Fish
ExpertPantodon buchholzi
- Tank volume:
- from 200 L
- Maximum size:
- up to 13 cm
- Temperature:
- 23–30 °C
- pH:
- 6–7.5
Pictus Catfish
IntermediatePimelodus pictus
- Tank volume:
- from 200 L
- Maximum size:
- up to 15 cm
- Temperature:
- 22–26 °C
- pH:
- 6–7.5
Dwarf Puffer
ExpertCarinotetraodon travancoricus
- Tank volume:
- from 40 L
- Maximum size:
- up to 3.5 cm
- Temperature:
- 23–28 °C
- pH:
- 7–8