Bright pattern of dark spots on the pale pectoral fins. Small mouth. Wide interorbital distance and a thick, massive head on which, in large specimens rests a small, knoblike rostrum, because the rostrum is characterized by ontogenetic allometry: very long in juveniles, very short in adults. Lateral line scale count: subopercular 7-8; cheek series usually 8 (Ref. 40824).