What Divers Should Know About Potato Groupers

The potato grouper, Epinephelus tukula, is a robust inhabitant of the Indo-Pacific. Recognizable by the large, dark, widely separated blotches that pattern its pale brownish-grey body, this species can reach substantial sizes. Adults have been recorded at a maximum length of 200 cm (79 in) and a weight of 110 kg (240 lb).

Divers typically encounter potato groupers on coral reefs, particularly within reef channels and around seamounts, often in areas experiencing strong currents. While juveniles favor shallower waters, adults are generally found at depths ranging from 10 to 150 meters. These are solitary fish, usually keeping to a relatively small home range. Though generally not shy, potato groupers are known to be aggressive and territorial, actively defending their space.