Body elongate, moderately compressed, body depth 3.6-3.8 in SL; preopercle regularly serrated, no spur with enlarged spines; 18-19 lower gill rakers; dorsal rays X, 12-13; anal rays III, 7-8; pectoral rays 16; tail with straight edge; scales rough, relatively large, lateral-line scales 49-51; a small isolated patch of scales on interorbital region.
Mainly red on upper half of head and body, white below; 4-5 pearl-white patches on back and 6-7 reddish bar-like extensions on lower sides; four brownish spots on dorsal fin and adjacent part of back and two smaller brown spots on upper surface of caudal peduncle.
Maximum size 8 cm.
Inhabits sand-rubble areas.
Depth: 5-20 m.
Known thus far only from Socorro Island in the Revillagigedos Group.