Diagnosis. Dorsal rays X,15; pectoral rays 16; lateral-
line complete, the pored scales 32-34; scales above
lateral line to origin of dorsal fin 3; scales dorsally on
head extending to posterior nostrils; scales present on
maxilla; body depth 2.6-3.2 in SL; margin of preopercle
finely serrate, without antrorse spines on ventral edge;
fourth or fifth dorsal spine longest, 2.6-3.1 in SL;
second dorsal soft ray longest, prolonged as a filament
in males; second pelvic soft ray longest, greatly prolonged
as a filament in males; caudal fin emarginate, the second
to fourth branched rays filamentous (but easily broken);
pale in alcohol with a blackish spot on first four or five
lateral-line scales and adjacent scales of the row above.