Body elongate, compressed, slender, coelome but little less than 
tail measured to caudal base. Head small, compressed. Snout short. 
Eye large, before middle in length of head. Maxillary oblique, reaches 
to eye. Interorbital depressed, narrow. Gill openings wide, gill mem¬ 
branes joined with rather narrow isthmus. Branchiostegals 4. Gill 
rakers short. Psendobranchiae not evident. Scales very small, cycloid, 
well separated, appear as if sunk in the skin and not present on the head. 
No lateral line. Vertical fins lower than body depth. Soft dorsal begins 
before anal. Caudal rounded. Pectoral broad, short. Ventrals separated, 
inserted opposite pectoral origin. 
Related to Ptereleotris Gill, but that genus with fewer dorsal rays 
24 to 36, and fewer anal rays 24 to 32, scales more numerous or 150 to 
170 in a longitudinal series, scales forward on predorsal nearly to 
occiput, and caudal lunate. 
