Saltwater Β· Year-round where open; best from May to October β winter spawning aggregations get extra protection, check seasonal closures
Black Grouper
Mycteroperca bonaci
The heavyweight grouper of Florida and the Keys, a solitary reef predator that bolts for its hole the instant it is hooked. Winter spawning aggregations get extra protection, so check seasonal closures before a winter trip. A prime food fish and a genuine test of heavy tackle.
Seasons Β· Peak
Identifying features
- Rectangular, chain-like 'box' blotches in neat rows along the side β the signature pattern
- Squared-off (truncate) tail β versus the gag grouper's concave tail
- Broad head with a gently sloped forehead and large mouth
- Olive to dark brown base color that can pale or darken quickly
- Pectoral fins dark with a thin pale edge
Habits
- Solitary and territorial around a home reef, rock pile or wreck
- Ambushes fish, crabs and lobsters from cover, then races back to its hole
- Born female and transforms to male with age β the biggest fish are males
- Forms winter spawning aggregations that receive extra protection β check seasonal closures
- Hooked fish must be stopped in the first seconds or they cut the line on structure
Distribution
Where to find them
- Reef edges and wrecks in the Florida Keys
- Rock piles and ledges off southwest Florida
- Atlantic reef lines off southeast Florida
Where they live
How to catch them
Trolling large plugs and live baits over reef edges Boat
Rig: Heavy trolling outfit with large deep-diving plugs or slow-trolled live baits along reef edges and rock piles
Bait/lure: Large plugs, live baits
Key tip: Troll tight to the reef edge at the depth of the structure β blacks rise from their holes to smash a passing bait.
Bottom fishing live pinfish and grunts on heavy tackle Rock fishing
Rig: Heavy conventional outfit, long leader and a live pinfish or grunt dropped tight to wrecks and rock piles
Bait/lure: Live pinfish, live grunts
Key tip: Lock the drag and win the first ten seconds β if a black reaches its hole, the fight is usually lost.
Best baits & lures
Baseline setup
- Rod: Heavy 6.5-7.5 ft conventional rod
- Line: 50-80 lb braid or mono with 80-100 lb leader
- Terminal: 7/0-9/0 circle hooks, heavy sinkers, large trolling plugs
Recommended gear for this species
Rod Β· Best value
9' 5-weight fly rod outfit
β US$180-260
Covers chironomid lakes and small rivers with one setup.
Flies Β· Budget
Chironomid assortment (30 patterns)
β US$25-40
Chironomids are 60% of a lake rainbow's diet in spring.
Picks come from our rule library β never paid placements. Prices are guides; affiliate links may earn us a commission.
Typical size
Common 5-20 lb (2.3-9.1 kg); large fish 50-100 lb (23-45 kg)
On the table
Excellent β firm white flakes; note large old groupers in some areas can carry ciguatera risk, so follow local advisories.
Similar species
Gag GrouperGag grouper has wavy worm-like markings and a clearly concave (forked-in) tail; black grouper has rectangular box blotches in rows and a squared-off tail
ScampScamp is smaller and slimmer with yellowish tail corners and an elongated top tail ray; black grouper is heavier-bodied with box blotches and a squared tailRegulations vary by area and can change in-season β always check the official rules for your area before you fish. Regulations guide β
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