Hyporthodus mystacinus, the misty grouper, black grouper, convict grouper, eightbar grouper or moustache grouper, is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is part of the family Serranidae, which also includes the anthias and sea basses. It is primarily found in the Caribbean and the Gulf of Mexico with populations present around the Galapagos Islands and Central American coastlines.