Author: Britski & Ortega, 1983
FBname: Long-finned cambeva
Comments: Found in streams in the Atlantic forest; backwaters with no flow to 0.44 meter per second water flow.  Dwells mostly in pools beneath small waterfalls in steep hill streams flowing over rocky and sandy substrates.  Density varies from 3 to 25 individuals per square meter.  At densities of 18 to 25 individuals per square meter, fish aggregates in loose groups of up to 30 individuals; largest ones tend to be solitary and territorial.  Nektonic, active both during daytime and at night; juveniles and small adults of up to 9 cm TL are more active at daytime, whereas larger ones are active mostly at night.  Uses visual, tactile, and chemo-sensory orientation to feed on bottom-dwelling aquatic and terrestrial arthropods in the water column or on the surface.  Diet includes immature aquatic insects, crustaceans, adult terrestrial winged insects whole or fragmented, as well as carrion.  Forages mostly by scanning the bottom, the barbels touching the substrate, but visual oriented drift feeding is also employed by individuals up to 5 cm TL.  While foraging may bury into sand or plant debris and sifts through opercular openings and mouth.  Reproduces at the onset of rainy season (austral summer).  Mature oocytes about 0.2 cm diameter; pterigyolarvae range 1-1.5 cm TL.  Spotted color pattern differs consistently between stream populations, an indication of genetic differentiation (Ref. 50917).