Head Pores - Oculoscapular canal with pores B',D,F,G,H' and preopercle canal with two pores.
Scales - Scales in lateral series 51, extending forward almost to pectoral axil, absent on dorsum immediately below spinous dorsal fin; scales mostly cycloid with small patch of weakly ctenoid scales under pectoral fin.
Fins - D1 - VII, spines 3-5 elongate in males and females, females may extend to base of D2 and males longer; D2 - 17(17-18); pectoral - 22(21-24); anal - 18(17-18)
Head - fleshy nuchal crest very low in females, absent in males
Color - MALE- IN LIFE: body dusky, greenish yellow dorsally, becoming white ventrally; belly bluish; two small yellow spots on body under dorsal edge of appressed pectoral fin; yellow spot on mid-pectoral base, another on midline of nape; two iridescent blue, longitudinal stripes on cheek; two iridescent blue spots on anterior edge of opercle, and two orange-yellow spots on posterior edge; lips dusky yellow; chin dusky. Spinous dorsal fin dusky with yellowish cast to basal portion; a hyaline slash originating at base of each and running at slight diagonal to each spine; distal portion of fin dark with orange-red cast to filaments; soft dorsal fin dusky with narrow, dark distal margin and orange cast; pelvic fins dusky with yellow distal margin; anal fin dusky with yellow distal margin and a submarginal dark stripe; caudal fin with yellow ventral stripe and several orange spots dorsally; median caudal rays dusky orange.
FEMALE preserved color: body pale above the anal fin; corner of mouth beneath the tip of maxilla darkly pigmented; spinous dorsal fin with broad, dusky basal stripe with narrow dusky stripe above; second dorsal fin dusky with basal hyaline stripe. (Birdsong 81)
Distribution - Peru, Panama, Costa Rica and El Salvador
Habitat - Muddy and detritus sediments in mangrove swamps