(total): 5 - 9;
soft rays: 9 - 10;
Vertebrae: 28 - 29. First dorsal fin present but covered by thick layer of skin forming a characteristic high crest with embedded spines. Bony tubercles present, arranged in 3 widely separated rows of large flattened tubercles on each side of body. Gill openings large, extend- extending below level of upper pectoral fin ray. Pyloric present 36-79. Ventral sucking disc formed by the modified pelvic fin (Ref. 232).