HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsThreespot grouper Threespot grouper (Epinephelus trimaculatus) Scientific name: Epinephelus trimaculatus Valenciennes, 1828 The Threespot grouper (Epinephelus trimaculatus) is a marine fish of the family Serranidae. BiologyJuveniles are common in tide pools and in shallow clear water around rocks and coral reefs; adults found in deeper water. Kuo et al. (1988, ) induced sex reversal and artificial spawning (referred to as 'Epinephelus fario').Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEpinephelus trimaculatusFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length40.0EnvironmentMarine; reef-associatedClimateTropicalDistributionNorthwest Pacific: southern Japan, Korea, Taiwan, and China. Reports of the species (under the valid name or as Epinephelus fario) from the Indian Ocean are apparently based on misidentifications.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: commercial; aquaculture: experimentalResilienceMedium, 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