
Rainbow shark
Epalzeorhynchos frenatum
It claims a patch of the bottom and chases off any lookalike that enters.
The Rainbow shark (Epalzeorhynchos frenatum) is a tropical freshwater fish of the family Cyprinidae. It swims in midwater, close to the bottom. Adults grow to about 15 cm. In the aquarium it needs a tank at least 120 cm long and water at 22–27 °C.
- Size
- 15 cm
- Smallest tank
- 120 cm
- Temperature
- 22–27 °C
- Care
- Moderate
In the aquarium
Temperature22–27 °C
pH6.5–7.8
Hardness4–16 °dGH
- Temperament
- Semi-aggressive
- Diet
- Omnivore
- Activity
- Moderate
- Water layer
- Bottom
- Group
- Lives on its own
- Plants
- Plant safe
These values are compiled from real species data, and the LumaReef simulation is built to keep them true to life.
Which tank it fits
- Nano60 cm · 65 litresToo small
- Standard90 cm · 180 litresToo small
- Wide120 cm · 300 litres18 of them
- Living room180 cm · 650 litres40 of them
- Showcase250 cm · 1,200 litres75 of them
- Gallery300 cm · 1,440 litres90 of them
Who it lives with
Gets along64 species
- Bristlenose pleco
- Sailfin molly
- Giant danio
- Boesemani rainbowfish
- Scissortail rasbora
- Congo tetra
- Molly
- Bronze corydoras
- Betta (Siamese fighting fish)
- Silver hatchetfish
- Pearl danio
- Dwarf chain loach
- Emperor tetra
- Zebra danio
- Cherry barb
- Platy
- Odessa barb
- Cardinal tetra
- Lemon tetra
- Penguin tetra
- Harlequin rasbora
- Black neon tetra
- Glowlight tetra
- Guppy
Caution31 species
Both semi-aggressive
- Freshwater angelfish
- Swordtail
- Dwarf gourami
- Black skirt tetra
- Diamond tetra
- Tiger barb
- Serpae tetra
- Firemouth cichlid
- Yoyo loach
- Peacock cichlid
- Three spot gourami
- Julidochromis
- African butterflyfish
- Severum
- Yellow lab cichlid
- Kissing gourami
- Cockatoo cichlid
- Multies shell dweller
- Dwarf puffer
- Frontosa
- Oscar
- Black ghost knifefish
Narrow shared temperature range
Not together4 species
Water temperatures do not overlap
In the wild
- Water type
- Freshwater
- Climate zone
- Tropical
- Habitat
- Midwater, close to the bottom
- Aquarium trade
- Traded commercially
Conservation status
Classification
- OrderCypriniformes
- FamilyCyprinidae
- GenusEpalzeorhynchos
- SpeciesEpalzeorhynchos frenatum
- Described byFowler, 1934
In other languages
- English
- Rainbow Sharkminnow
- German
- Grüner Fransenlipper
- Spanish
- Tiburón arco iris
- Russian
- Таиландский лабео
- Japanese
- レインボーシャーク
Quick answers
- Rainbow shark size: how big does it get?
- Adults reach about 15 cm. Record sizes among the 4 Epalzeorhynchos species on LumaReef: 9.3 cm (Redfin Shark) to 16 cm (Flying Fox Carp).
- Rainbow shark tank size: what is the minimum?
- A tank at least 120 cm long. In LumaReef that is the Wide tank or larger.
- Rainbow shark water parameters: what does it need?
- Temperature 22–27 °C, pH 6.5–7.8, hardness 4–16 °dGH. Close to what most Epalzeorhynchos on LumaReef need (20–26 °C).
- Rainbow shark tank mates: what can it live with?
- It gets along with 64 of the 99 freshwater species in the catalogue, such as Bristlenose pleco, Sailfin molly, and Giant danio.
- Rainbow shark: alone or in a group?
- It can be kept on its own.
- Rainbow shark and plants: is it plant safe?
- Yes, it leaves plants alone.
Similar species
Sources
Rainbow shark: compiled from these references.









