From their form they are only
little differences from each other. Their trademark
is the big head with the little eyes and short barbles
but with an almost head wide mouth. They are sluggish
animals which hardly move and only lie waiting for
prey. Habitat: C. fowleri
is to be found exclusively in the Rio São Francisco
of Brazil and there mainly in the more calm flowing
river sections. As with most of this family this species
is very much a predator. Four species have been described
to the genus Cephalosilurus resident in South
America. Three of them have been introduced for keeping
in the aquarium, C.
nigricaudus and C. fowleri.