Adults are found in coral reefs and intertidal 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): 18 - 19; Dorsal soft rays (total): 9 - 11; Anal spines: 2; Anal soft rays: 20 - 22. Scales from head posteriorly to behind the eye but none on cheek; lobate supraorbital tentacle; body coloration white; yellow or orange on scale edges; 6 uneven, oblique, dark brown bands bifurcating ventrally; uneven brown bar below eye with white posterior border; females with thin, oblique, red and white bands on second and third dorsal fins; dull orange in males. Dorsal rays IV + XIV-XV + 9-11 (typically XV + 10); pectoral rays usually 15; lateral line discontinuous, 12-15 + 24-27; mandibular pores 3 + 2 + 3 .: elongated.
Behavioural data for Thomas' triplefin is currently being reviewed.
Marine; reef-associated; depth range 1 - 20 m . Tropical Indian Ocean to New Caledonia, Rapa, the Tuamoto Archipelago and Mangaréva.
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 3 records indexed .
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