Adults occur on rocky substrates in association with coral reefs or coral reef lagoons, from shallow areas to the outer reef slope, also in intertidal rock pools . Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites . Larvae are planktonic which occur primarily in shallow, nearshore waters .
Dorsal spines (total): 14 - 15; Dorsal soft rays (total): 8 - 10; Anal spines: 1; Anal soft rays: 17 - 18. Male dark grey with large yellow patch dorsally on head, and lower head and pectoral-fin base black. Female tan with 5 double brown bars on side. Both sexes with black bar at caudal-fin base preceded by white bar/saddle. Dorsal rays III + XI-XII + 8-10; anal rays I,17-18; pectoral rays 14-17; pelvic rays I,2; lateral line interrupted 15-17 + 17-22; head, chest, and pectoral-fin base scaleless; short orbital tentacle present; mandibular pores 3 + 1 + 3. Maximum size to 3.2 cm TL .: elongated; Cross section: oval.
Behavioural data for Yellownape tripplefin is currently being reviewed.
Marine; reef-associated; depth range 0 - 22 m . Tropical Central Pacific.
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .
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