GAG – Mycteroperca microlepis

Article by: Mark Mayo

Family Serranidae, SEA BASSES AND GROUPER

Description: brownish gray in color with dark worm-like markings on sides; strong serrated spur at bottom margin of preopercle, less noticeable in large specimens; fins dark, with anal and caudal having white margin; often confused with black grouper; most noticeable differences are brassy spots on black grouper; tail of gag is slightly concave, black grouper’s tail is square; gag has white margin on anal and caudal fins, black does not; under 10 pounds, gag’s spur on preopercle is distinctive, where black is gently rounded.

Similar fish: black grouper, M. bonaci.

Where found: adults OFFSHORE over rocks and reefs; juveniles occur in seagrass beds INSHORE.

Size: common to 25 pounds.

Remarks: forms spawning aggregations in water no shallower than 120 feet in Middle Grounds area, January through March; current research to identify similar aggregations off the Atlantic coast is ongoing; young gags are predominantly female, transforming into males as they grow larger; feeds on fish and squid.

Mark Mayo

I research and report on fishing, fishing gear/equipment, survival topics, and marketing for outdoors related businesses. I assist here on CB Fishing as the editor. Articles may contain AI researched content. All content is published for education and entertainment purposes only, NOT LIFE, HEALTH, SURVIVAL, FINANCIAL, BUSINESS, LEGAL OR ANY OTHER ADVICE. Learn more about Mark Mayo