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Red Finned Shark

Picture of Red finned shark Picture of Albino Red finned shark

Left: Photo contributed by Peter Routon, CA, USA.
© Peter Routon
Right: Albino form, photo taken at Wharf Aquatics, © Sean Evans

Common name:Red Finned Shark, Ruby shark, Rainbow shark
Scientific name:Epalzeorhynchos frenatum
Synonyms:Labeo frenatus (old genus name), E. erythrurus
Size:Up to 6" (15cm)
Origin:S.E. Asia (Thailand)
Tank setup:Planted tank with caves of wood and/or rocks, preferably at least 3ft/92cm in length.
Compatibility:Territorial, and can be aggressive, particularly towards similar fish. Mixes well with active barbs, Rainbowfish, etc that occupy the middle and upper areas of the tank.
Temperature:22-26oC (72-79oF)
Water chemistry:Fairly soft, slightly acidic preferred (pH 6.5-7.0), but not essential.
Feeding:Omnivorous, some vegetable component to the diet is recommended, will graze on algae.
Sexing:Males have a slimmer body profile, and black lines on the anal fin.
Breeding:Only occasionally achieved in aquaria - aggression is a problem.
Comments: This fish is often territorial and can be aggressive, particularly towards its own species, but also to others. This aggressive nature can become more apparent with age. It is not generally as aggressive as its relative the Red-tailed black shark, and it is not generally a good idea to keep more than one of these species together, except in very large tanks with plenty of decor, so that territories can be established without the fish being constantly in site of each other.
A very similar species, Epalzeorhynchos munense, may be sold under the same common names.




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