Nothing is known of its habitat and biology . Absence of additional specimens is puzzling. The only specimen was obtained from the natives of Tongatapu by J. Quoy and P. Gaimard during the expedition of J. Dumont d'Urville, 1826-1829.
Dorsal spines (total): 11; Dorsal soft rays (total): 17; Anal spines: 3; Anal soft rays: 8. Distinguished by the following characteristics: dorsal part of head and snout green; cheeks pale green; body greenish with 7-8 alternating stripes of greenish brown and yellow-orange; dorsal and anal fins greenish, spotted with reddish brown at base; paired fins light greenish without spots; caudal fin greenish with faint reddish bars; body depth 3.4 times in SL; head length 2.6 times in SL; pointed head; interorbital area flat; dorsal profile of head slightly convex; subangular preopercle;, 5 distinctly enlarged serrae at the angle; straight upper edge of operculum; maxilla not reaching past vertical at rear edge of eye; 2 rows of teeth in midlateral part of lower jaw; caudal fin rounded; ctenoid lateral body scales .: fusiform / normal; Cross section: compressed.
Behavioural data for Tonga grouper is currently being reviewed.
Diet information for Tonga grouper is currently being compiled.
Reproduction data for Tonga grouper is currently being compiled.
Marine; demersal. Tropical; 20°S - 23°S, 177°W - 174°W Central Pacific: known only from Tonga.
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