Adults are found in rock and coral reefs 5 m or shallower . 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 - 17; Dorsal soft rays (total): 8 - 10; Anal spines: 1; Anal soft rays: 16 - 19. Brown to reddish with yellowish patch on top of head, triangular black markings along belly, and blackish anal and caudal fins (central portion and margin of caudal fin lighter). Male with black "mask" covering front and lower two-thirds of head. Dorsal rays III + XI-XIV + 8-10; anal rays I,16-19; pectoral rays 16-17; pelvic rays I,2; lateral line interrupted, 15-19 + 14-19; head, chest, and pectoral-fin base scaleless; short orbital tentacle present; mandibular pores 3-5 + 1 + 3-5. Maximum size to 2.8 cm TL .: elongated; Cross section: oval.
Behavioural data for Blackbelly triplefin is currently being reviewed.
Diet information for Blackbelly triplefin is currently being compiled.
Reproduction data for Blackbelly triplefin is currently being compiled.
Marine; reef-associated; depth range 0 - 5 m . Tropical
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .
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