Beginner – IntermediateLongnose Peppermint Otocinclus
Rhinotocinclus longirostris
- Adult size
- ≤ 2.5 cm (≤ 1 in)
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 24–27 °C
Aquarium Fish Database
Explore freshwater aquarium fish by care level, size, temperament, swimming zone, water parameters, and compatibility.
Beginner – Intermediate
Intermediate – AdvancedLongsnout distichodus
Distichodus lusosso
- Adult size
- ≤ 40 cm (≤ 15.7 in)
- Aquarium size
- 500 L or larger / ≥ 180 cm (≥ 70.9 in) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Bottom to middle swimmer
- Temp
- 22–26 °C
Beginner – IntermediateLoreto Tetra
Hyphessobrycon loretoensis
- Adult size
- ≤ 3 cm (≤ 1.2 in)
- Aquarium size
- 60 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 21–27 °C
Beginner – IntermediateLumbantobing Goby
Pseudogobiopsis lumbantobing
- Adult size
- ≤ 4 cm (≤ 1.6 in)
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 22–28 °C
Beginner – IntermediateLyretail Killifish
Aphyosemion australe
- Adult size
- ≤ 6 cm (≤ 2.4 in)
- Aquarium size
- 30 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 20–31 °C
IntermediateMacmasters Apistogramma
Apistogramma macmasteri
- Adult size
- ≤ 7 cm (≤ 2.8 in)
- Aquarium size
- 100 L or larger / ≥ 80 cm (≥ 31.5 in) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 23–29 °C
IntermediateMadagascar Rainbowfish
Bedotia madagascarensis
- Adult size
- ≤ 15 cm (≤ 5.9 in)
- Aquarium size
- 120 L or larger / ≥ 120 cm (≥ 47.2 in) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–25 °C
Beginner – IntermediateMagnificent Killifish
Hypsolebias magnificus
- Adult size
- ≤ 5 cm (≤ 2 in)
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 22–26 °C
Beginner – IntermediateMahecola Barb
Puntius mahecola
- Adult size
- ≤ 7.5 cm (≤ 3 in)
- Aquarium size
- 100 L or larger / ≥ 90 cm (≥ 35.4 in) minimum length
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 17–23 °C
Beginner – IntermediateMalabar Danio
Devario malabaricus
- Adult size
- ≤ 10 cm (≤ 3.9 in)
- Aquarium size
- 243 L or larger / ≥ 120 cm (≥ 47.2 in) minimum length
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 17–25 °C
Beginner – IntermediateMalayan Bumblebee Catfish
Leiocassis poeciloptera
- Adult size
- ≤ 17 cm (≤ 6.7 in)
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 20–25 °C
IntermediateMamou Killifish
Scriptaphyosemion guignardi mamou
- Adult size
- ≤ 5.5 cm (≤ 2.2 in)
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 21–25 °C
Beginner – IntermediateMarble Hatchetfish
Carnegiella strigata strigata
- Adult size
- ≤ 4.5 cm (≤ 1.8 in)
- Aquarium size
- 100 L or larger / ≥ 80 cm (≥ 31.5 in) minimum length
- Temperament
- Peaceful
- Zone
- Top swimmer
- Temp
- 24–28 °C
IntermediateMarble Knifefish
Adontosternarchus balaenops
- Adult size
- ≤ 25 cm (≤ 9.8 in)
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 24–28 °C
IntermediateMarble Sturisoma Whiptail Catfish
Sturisoma aureum
- Adult size
- ≤ 20 cm (≤ 7.9 in)
- Aquarium size
- 300 L or larger / ≥ 120 cm (≥ 47.2 in) minimum length
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 20–26 °C
Beginner – IntermediateMarbled Hatchetfish
Carnegiella strigata fasciatus
- Adult size
- ≤ 4.5 cm (≤ 1.8 in)
- Aquarium size
- 100 L or larger / ≥ 80 cm (≥ 31.5 in) minimum length
- Temperament
- Peaceful
- Zone
- Top swimmer
- Temp
- 24–28 °C
IntermediateMarbled Headstander
Abramites hypselonotus
- Adult size
- ≤ 14 cm (≤ 5.5 in)
- Aquarium size
- 500 L or larger / ≥ 120 cm (≥ 47.2 in) minimum length
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 23–28 °C
IntermediateMarbled Sleeper Goby
Oxyeleotris marmorata
- Adult size
- ≤ 65 cm (≤ 25.6 in)
- Aquarium size
- 565 L or larger / ≥ 150 cm (≥ 59.1 in) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Bottom to middle swimmer
- Temp
- 22–29 °C
Beginner – IntermediateMarliers Julie
Julidochromis marlieri
- Adult size
- ≤ 15 cm (≤ 5.9 in)
- Aquarium size
- 110 L or larger / ≥ 120 cm (≥ 47.2 in) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Bottom to middle swimmer
- Temp
- 22–26 °C
Beginner – IntermediateMascara Barb
Dawkinsia assimilis
- Adult size
- ≤ 12 cm (≤ 4.7 in)
- Aquarium size
- 243 L or larger / ≥ 120 cm (≥ 47.2 in) minimum length
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 18–27 °C
Intermediate – AdvancedMbu Pufferfish
Tetraodon mbu
- Adult size
- ≤ 75 cm (≤ 29.5 in)
- Aquarium size
- 2040 L or larger / ≥ 240 cm (≥ 94.5 in) minimum length
- Temperament
- Aggressive
- Zone
- Bottom to middle swimmer
- Temp
- 23–26 °C
Beginner – IntermediateMegaptera Apistogramma
Apistogramma megaptera
- Adult size
- ≤ 7 cm (≤ 2.8 in)
- Aquarium size
- 100 L or larger / ≥ 100 cm (≥ 39.4 in) minimum length
- Temperament
- Semi-Aggressive
- Zone
- Bottom to middle swimmer
- Temp
- 22–29 °C
IntermediateMegasema Eartheater
Geophagus megasema
- Adult size
- ≤ 18 cm (≤ 7.1 in)
- Aquarium size
- 648 L or larger / ≥ 180 cm (≥ 70.9 in) minimum length
- Temperament
- Peaceful
- Zone
- Middle swimmer
- Temp
- 22–30 °C
Beginner – IntermediateMeghalaya Danio
Danio meghalayensis
- Adult size
- ≤ 10 cm (≤ 3.9 in)
- Aquarium size
- 300 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 17–26 °C