It is a typical inhabitant of black or clear waters , usually in forest streams with moderate to swift current flow over firm sand or gravel bottoms .
H. marmoratus is nocturnal and feeds mainly on terrestrial insects , particularly ants .
H. marmoratus is a typical inhabitant of black or clear waters , usually in forest streams with moderate to swift current flow over firm sand or gravel bottoms .
H. marmoratus is nocturnal and feeds mainly on terrestrial insects , particularly ants .