HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsSumman grouper Summan grouper (Epinephelus summana) Scientific name: Epinephelus summana Forssk?l, 1775 The Summan grouper (Epinephelus summana) is a brackish-water fish of the family Serranidae. Native range: Eastern Indian Ocean, known only from the Red Sea and Gulf of Aden. BiologyDorsal spines (total): 11; Dorsal soft rays (total): 14-16; Anal spines: 3; Anal soft rays: 8 - 9. Body robust. Serrae at the angle of the preopercle slightly enlarged; the upper edge of the operculum strongly convex. Posterior nostril of adults vertically elongate. Very similar to E. ongus which has longer pectoral fins, and a narrow white margin with broad blackish submarginal band on the median fins, which are absent or poorly developed in E. summana. Generally dark olive-brown to dark brownish gray with large pale blotches (most larger than the eye) and numerous small white spots overlying this pattern. Fins covered with small white spots, except for pectoral fins where the white spots are confined to the base.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEpinephelus summanaFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length52.0Common length40.0Depth range1–20 m (3–66 ft)EnvironmentMarine; brackish; reef-associated; depth range 1 - 20 mClimateTropicalDistributionEastern Indian Ocean: known only from the Red Sea and Gulf of Aden.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026