Genus: Cryptotrema, Blennies
simple cirri - nostril, eye, nape
D XXVII, 11-13; 1st 3 spines elongate, flexible
operculum - no spines
LL bends under D spine ~XX, front part 45-50 scales open under scales
Head and body compressed; mouth large, reaches under rear edge of pupil; conical teeth on both jaws, an enlarged outer row, and a inner band of small teeth; a single row of enlarged teeth on center and sides of roof of mouth; a simple cirrus at nostril, above eye and on side of nape; operculum without spines; dorsal fin XXVII, 11-13, first 3 spines soft and flexible, remainder sharp and inflexible; principal tail fin rays branched; lateral line complete, front straight portion 45-50 scales, bends down under ~spine XX-XXII of dorsal fin, all front pores open under scales; head, chest and belly without scales.
A NE Pacific genus with two species; one endemic to the northern Gulf of California.