Beginner – IntermediateCostello Tetra
Hemigrammus hyanuary
- Adult size
- up to 4 cm
- Aquarium size
- 45 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 23–26 °C
Aquarium Fish Database
Explore freshwater aquarium fish by care level, size, temperament, swimming zone, water parameters, and compatibility.
Beginner – Intermediate
IntermediateCow River Loach
Neogastromyzon crassiobex
- Adult size
- up to 5 cm
- Aquarium size
- 45 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 21–26 °C
Beginner – IntermediateCowboy Whiptail Catfish
Lamontichthys llanero
- Adult size
- up to 20 cm
- Aquarium size
- 240 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 24–28 °C
Beginner – IntermediateCrystal Red Tetra
Hyphessobrycon haraldschultzi
- Adult size
- up to 2.5 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–26 °C
Beginner – IntermediateCrystalline Rosy Tetra
Hyphessobrycon epicharis
- Adult size
- up to 4 cm
- Aquarium size
- 45 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–25 °C
Beginner – IntermediateCuckoo Catfish
Synodontis multipunctatus
- Adult size
- up to 27.5 cm
- Aquarium size
- 300 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 23–27 °C
Beginner – IntermediateCurmuca Barb
Hypselobarbus curmuca
- Adult size
- up to 12 cm
- Aquarium size
- 120 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 20–26 °C
Beginner – IntermediateDaisys Blue Ricefish
Oryzias woworae
- Adult size
- up to 3 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–28 °C
IntermediateDawn Tetra
Aphyocharax paraguayensis
- Adult size
- up to 4.5 cm
- Aquarium size
- 120 L or larger
- Temperament
- Semi-Aggressive
- Zone
- Middle swimmer
- Temp
- 22–27 °C
Beginner – IntermediateDeepwater Creek Rainbowfish
Melanotaenia splendida
- Adult size
- up to 12 cm
- Aquarium size
- 120 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 20–30 °C
Beginner – IntermediateDelphax Corydoras
Corydoras delphax
- Adult size
- up to 6 cm
- Aquarium size
- 60 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 21–26 °C
Intermediate – AdvancedDemasoni Cichlid
Pseudotropheus demasoni
- Adult size
- up to 10 cm
- Aquarium size
- 200 L or larger
- Temperament
- Aggressive
- Zone
- Bottom to middle swimmer
- Temp
- 24–28 °C
IntermediateDemon Eartheater
Satanoperca jurupari
- Adult size
- up to 25 cm
- Aquarium size
- 300 L or larger
- Temperament
- Peaceful
- Zone
- Middle swimmer
- Temp
- 23–28 °C
BeginnerDenison Barb
Sahyadria denisonii
- Adult size
- up to 11 cm
- Aquarium size
- 120 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 18–27 °C
Intermediate – AdvancedDesana Corydoras
Corydoras desana
- Adult size
- up to 6.5 cm
- Aquarium size
- 100 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 22–26 °C
Beginner – IntermediateDesert Rainbowfish
Melanotaenia splendida tatei
- Adult size
- up to 10 cm
- Aquarium size
- 120 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 24–28 °C
Beginner – IntermediateDeze Chinese Sucker
Sinogastromyzon dezeensis
- Adult size
- up to 5.5 cm
- Aquarium size
- 60 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 20–24 °C
BeginnerDiamond Tetra
Moenkhausia pittieri
- Adult size
- up to 6 cm
- Aquarium size
- 80 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 23–27 °C
IntermediateDomino Tetra
Neolebias powelli
- Adult size
- up to 2.5 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–25 °C
IntermediateDrape Fin Barb
Oreichthys crenuchoides
- Adult size
- up to 5 cm
- Aquarium size
- 45 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–27 °C
IntermediateDuplicate Corydoras
Corydoras duplicareus
- Adult size
- up to 5 cm
- Aquarium size
- 60 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 20–26 °C
Intermediate – AdvancedDusky Millions Fish
Phalloceros caudimaculatus
- Adult size
- up to 6 cm
- Aquarium size
- 60 L or larger
- Temperament
- Peaceful
- Temp
- 17–22 °C
Beginner – IntermediateDwarf Chain Loach
Ambastaia sidthimunki
- Adult size
- up to 6.5 cm
- Aquarium size
- 80 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 22–27 °C
Beginner – IntermediateDwarf Ctenopoma
Microctenopoma nanum
- Adult size
- up to 7 cm
- Aquarium size
- 80 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 17–23 °C
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