THE FRESHWATER FIELD GUIDE
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Search the full catalog of fish, plants, and invertebrates.
331 species found
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Fish · beginner
Least killifish
Heterandria formosa
- Size
- 4.00 cm
- Temp
- 18.9–26.0°C
- pH
- 6.5–8.0
- From
- Southeast United States
Fish · intermediate
Lemon cichlid
Neolamprologus leleupi
- Size
- 13.00 cm
- Temp
- 23.0–28.0°C
- pH
- 7.5–9.0
- From
- East Africa
Fish · intermediate
Lemon tetra
Hyphessobrycon pulchripinnis
- Size
- 7.00 cm
- Temp
- 20.0–28.0°C
- pH
- 5.0–7.5
- From
- Amazon Basin
Fish · beginner
Leopard betta
Betta pardalotos
- Size
- 9.00 cm
- Temp
- 22.0–28.0°C
- pH
- 4.0–7.8
- From
- Southeast Asia
Fish · intermediate
Leopard bushfish
Ctenopoma acutirostre
- Size
- 20.00 cm
- Temp
- 20.0–30.0°C
- pH
- 5.5–7.5
- From
- Congo Basin
Fish · intermediate
Licorice gourami
Parosphromenus deissneri
- Size
- 8.00 cm
- Temp
- 21.0–28.0°C
- pH
- 3.5–7.0
- From
- Southeast Asia
Fish · beginner
Lyretail killifish
Aphyosemion australe
- Size
- 9.00 cm
- Temp
- 18.0–27.8°C
- pH
- 5.0–7.0
- From
- West Africa
Fish · intermediate
Macmaster's apistogramma
Apistogramma macmasteri
- Size
- 9.00 cm
- Temp
- 22.0–30.0°C
- pH
- 5.0–7.0
- From
- Amazon Basin
Fish · intermediate
Madagascar rainbowfish
Bedotia madagascariensis
- Size
- 18.00 cm
- Temp
- 22.0–29.0°C
- pH
- 5.0–8.0
- From
- Australasia
Fish · intermediate
Mahachai betta
Betta mahachaiensis
- Size
- 8.00 cm
- Temp
- 23.0–30.0°C
- pH
- 6.0–8.5
- From
- Southeast Asia
Fish
Malabar danio
Devario malabaricus
Fish · beginner
Mandor betta
Betta mandor
- Size
- 8.00 cm
- Temp
- 22.0–29.0°C
- pH
- 4.0–7.5
- From
- Southeast Asia
Fish · beginner
Marbled hatchetfish
Carnegiella strigata
- Size
- 10.00 cm
- Temp
- 24.0–28.0°C
- pH
- 5.8–7.5
- From
- Amazon Basin
Fish
Marbled headstander
Abramites hypselonotus
Fish · beginner
Masked julie
Julidochromis transcriptus
- Size
- 15.20 cm
- Temp
- 22.2–27.8°C
- pH
- 7.5–9.0
- From
- Lake Tanganyika
Fish · beginner
Medaka
Oryzias latipes
- Size
- 8.90 cm
- Temp
- 16.0–24.0°C
- pH
- 7.0–8.0
- From
- East Asia
Fish · intermediate
Meta corydoras
Corydoras metae
- Size
- 10.00 cm
- Temp
- 22.0–27.0°C
- pH
- 6.5–8.0
- From
- Andes to Atlantic coast
Fish · beginner
Metallic livebearer
Girardinus metallicus
- Size
- 6.35 cm
- Temp
- 21.1–27.0°C
- pH
- 7.0–8.0
- From
- Cuba
Fish · beginner
Molly
Poecilia sphenops
- Size
- 15.00 cm
- Temp
- 18.0–28.0°C
- pH
- 7.0–8.5
- From
- Central America
Fish · intermediate
Moonlight gourami
Trichopodus microlepis
- Size
- 15.00 cm
- Temp
- 24.0–30.0°C
- pH
- 5.5–7.5
- From
- Southeast Asia
Fish · intermediate
Mottled loach
Acanthocobitis botia
- Size
- 11.00 cm
- Temp
- 21.0–26.0°C
- pH
- 6.0–7.5
- From
- South and Southeast Asia
Fish · intermediate
Murray River rainbowfish
Melanotaenia fluviatilis
- Size
- 10.00 cm
- Temp
- 20.0–26.0°C
- pH
- 6.0–8.5
- From
- Murray-Darling Basin
Fish · intermediate
Neon blue goby
Stiphodon atropurpureus
- Size
- 5.08 cm
- Temp
- 20.0–28.0°C
- pH
- 5.5–8.3
- From
- Southeast Asia
Fish · beginner
Neon tetra
Paracheirodon innesi
- Size
- 5.00 cm
- Temp
- 20.0–28.0°C
- pH
- 5.0–7.5
- From
- Amazon Basin