Crenuchus spilurus is the only formally described species of the genus Crenuchus. There is, of course, at least one other species in Venezuela (see https://www.aquariumglaser.de/en/09-characoids-tetra-relationship/a_new_species_of_crenuchus__en/). C. spilurus was originally described from the Essequibo River in Guyana. We have now once again received extremely beautiful specimens from Manaus (Brazil).
In contrast to almost all other tetras, Crenuchus spilurus is a cave-breeder that also practises broodcare. Unfortunately, breeding is rarely successful. The sexes are easily distinguished by the sail-shaped dorsal and anal fins of the males. In females, these fins are normally pronounced. Despite their large mouths, Crenuchus are peaceful animals. Very small fish are regarded as food, but this applies to almost all fish species.
Crenuchus are quiet creatures that live close to the bottom. Their aquarium should not be too well lit and strong currents should also be avoided. Well-planted, slightly dimly lit tanks with a dark substrate show off the colors of Crenuchus to their best advantage. The males fully deserve their name “magnificent tetras” when they show off their widely spread fins. But they don’t do this to order – unfortunately!
For our customers: the animals have code 250205 on our stocklist. Please note that we only supply the wholesale trade.
Text & photos: Frank Schäfer