The black grouper is a large marine fish, growing up to 150 cm (5 ft) in length and 100 kg (220 lbs) in weight. It has an olive or gray body, with black blotches and brassy spots. The preoperculum is gently rounded. The black grouper is a solitary fish. The fish spawns between May and August. It is a protogynous hermaphrodite, i.e. the young are predominantly female, but transform into males as they grow larger. The black grouper has a life span of up to 40 years. Adults feed mainly on other fish and squid, though the younger fish feed on crustaceans, especially shrimp. Learn more about Black Grouper