Large aggregations of leopard groupers (Mycteroperca rosacea) are common, 

a sight too rarely seen in this hemisphere these days.

The yellow fish in the middle -- a "golden grouper" --  is a color-variation of  the same species.

(El Bajo, Cabo Pulmo National Marine Park, Baja del Sur, Mexico)

fish; groupers; seabass; leopard grouper; Chordata; sC Osteichthyes; Actinopterygii; sC Neopterygii; iC Teleostei; sO Acanthopterygii; Perciformes; sO Percoidei; Serranidae; sF Epinephilinae; Mycteroperca rosacea