Head square, high, with high eyes, and a short blunt snout; small spiracles behind and below eye; mouth short, well before eyes; strong grooves between nostrils and mouth; teeth small, pointed at front, like molars at rear; five gill slits, the last three over the pectoral base; a stout, sharp spine at the beginning of each of the 2 dorsal fins; origin of first dorsal ~ over pectoral base; anal fin present; tail fin asymmetric, but a well developed lower lobe.
A tropical to warm temperate genus of 8 species; found in the western Pacific and Indian Ocean as well as our area, where there are 3 endemic species.
