Decsription: boby shallow and oval (Ref. 126312). Head very long, narrow, and with a straight dorsal outline; eye small; interorbital area narrow; cheek and lacrimal average in depth (Ref. 126312). Snout long, acute, and slopes gently at 35-45°; premaxillary pedicel long and strongly prominent; jaws isognathous to slightly prognathous, long, slim, narrow, and rounded in dorsal view; gape large and slopes gently at 20-30°; maxilla extends to vertical through pupil; lower jaw shallow and with a straight ventral outline in lateral view, mental prominence absent, and lower jaw side nearly flat with an inclination of 15-25° to horizontal in anterior view; lower jaw expands slightly laterally halfway its length; upper jaw weakly expanded anteriorly; lips and oral mucosa large (Ref. 126312). Neurocranium shallow, ethmo-vomerine block decurved, preorbital region very shallow, 18-22% of neurocranium length, orbital region shallow, 28-30% of neurocranium length, and supraoccipital crest average in depth and wedge-shaped (Ref. 126312). Outer oral teeth numerous, unicuspid, and relatively small; necks stout, conical, and recurved; crowns recurved to strongly recurved, and acutely pointed; dental arcades rounded, and with anterior half expanded laterally; outer teeth closely and regularly set with neck-distances of 1/2-1 neck-width; no enlarged teeth posterior in upper jaw; inner teeth small, strongly recurved, unicuspid, and acutely pointed; tooth bands very slender crescent-shaped with 1-2 rows of inner teeth, and narrow posteriorly until only outer row remains past 2/3 lengths of tooth bands; inner teeth closely and regularly set on 1/2-1 neck-width from outer row in lower jaw, on 1-2 neck-widths from outer row in upper jaw; implantation recumbent; size uniform throughout tooth band (Ref. 126312). Lower pharyngeal bone average in length, triangular, slim, and shallow with a slightly deeper keel; pharyngeal teeth relatively large and slender; major cusps acutely pointed; cusp gaps straight; minor cusps and cusp protuberances very small; teeth in two median longitudinal rows equal in size and form to lateral teeth, 10 in each row; posterior transverse row with 16-21 teeth, implanted erectly with a lateral inclination; major cusps weakly recurved, bluntly pointed, and laterally compressed; minor cusps mostly absent (Ref. 126312). Chest scales small; transition to larger flank scales gradual; minute scales on proximal half of caudal fin; scales on longitudinal line 29-34, scales on upper lateral line 20-23, scales on lower lateral line 9-14, scales between dorsal fin and upper lateral line 6-8, scales between upper lateral line and anal fin 11-14, scales around caudal peduncle 17-19, scales between pelvic and pectoral fins 6-8, infraorbital cheek scales 3-5, postorbital cheek scales 8-12 (Ref. 126312). Caudal fin subtruncate; dorsal and anal fins reach to vertical through caudal-fin base; pectoral fin reaches to between genital opening and first anal-fin spine; pelvic fin reaches to between genital opening and first anal-fin spine in females, to first anal fin branched ray in males; first branched pelvic-fin ray elongated in dominant males (Ref. 126312). Ceratobranchial gill rakers in outer row of first gill arch very short, stout, and simple; posteriormost rakers weakly anvil-shaped; epibranchial gill rakers relatively slender and simple (Ref. 126312).

Colouration: Colouration in life of dominant males: body olive-green with yellow sheen; anterior part of flank and operculum bright orange-red; belly and chest speckled black; cheek olive-green with red sheen; snout and lips dusky; lower lip with blue sheen; branchiostegal membrane black; eye with dark silver outer ring and silver to golden inner ring; flank with well-defined mid-lateral and dorsal-lateral bands; dorsum with 5-7 faint vertical stripes between dorsal-fin base and dorsal-lateral band; lacrimal, nostril, and interorbital stripes and a mental blotch well defined; supraorbital stripe and nape band faint; pectoral fin hyaline; pelvic fin black; dorsal fin dusky and with black lappets; anal fin faint orange-red and with dusky base and posterior part, and 3 small yellow egg spots with hyaline rings; caudal fin with dusky base and hyaline distal part (Ref. 126312). Non-dominant males similar to dominant males except for white belly and chest and faint orange-red antero-dorsal part of flank above mid-lateral band (Ref. 126312). Colouration in life of females and juveniles: body, operculum, cheek, and lacrimal olive-green yellow; belly, chest, and lower jaw white; eye with dark silver outer ring and silver to golden inner ring; flank with well-defined mid-lateral and dorsal-lateral bands; dorsum with 5-7 faint vertical stripes between dorsal-fin base and dorsal-lateral band; lacrimal, nostril, and interorbital stripes and a mental blotch well defined; supraorbital stripe and nape band faint; pectoral and pelvic fins yellowish; dorsal fin dusky and with black lappets; anal fin yellow and with 2-3 small spots resembling egg spots; caudal fin dusky (Ref. 126312). Preserved colouration: dorsal part of body brown; ventral part of body yellowish to white in females; chest and belly speckled black in dominant males; cheek yellowish and snout dusky; flank with well-defined mid-lateral and dorsal-lateral bands; dorsum with 5-7 faint vertical stripes between dorsal-fin base and dorsal-lateral band; lacrimal, nostril, and interorbital stripes and a mental blotch well defined; supraorbital stripe and nape band faint; pectoral fin dusky; pelvic fin dusky in females, black in dominant males; dorsal fin dusky and with black lappets; anal fin with dusky base and posterior part, yellowish distal part, and 1-3 small egg spots; caudal fin dusky and faintly maculated in dorsal part (Ref. 126312).