Mangrove Snapper.
Bridge-and-mangrove ambusher. July full moon stacks the wrecks.
How they feed in the Keys
Mangroves (also called gray snapper) are the most adaptable Keys snapper. Inshore residents live in mangrove shorelines, channel cuts, and bridge pilings; "graytail" reef fish run 4–10 lbs on the patches and offshore wrecks. They get smarter than yellowtails fast — pressured bridge fish refuse anything but the lightest leader. The July–August full-moon spawning aggregations on offshore wrecks produce the biggest fish of the year.
74–86°F
Active 68–88°F
Strong incoming or outgoing at bridges — they ambush bait pulling through. On reefs, a current that carries chum is the everything.
Heavy current at bridges = aggressive feeding. They wait behind a pillar and ambush bait. Slack tide bridge fish are nearly impossible to catch.
Pre-front falling pressure produces the most aggressive bites of any season. Calm summer nights at bridges are the most reliable.
Falling pressure 6–12 hours ahead of a front is the magic window.
Night and dawn are peak. They feed at bridges all night — daytime is harder. Reef mangroves bite mid-morning through afternoon.
Full moon July–August offshore spawning aggregations on patches and wrecks 60–120 ft. Dark new-moon nights at bridges are also strong because the silhouette of bait against any glow is dinner.
80+ for ripping bridge current. The classic Channel Five mangrove bite happens on coefficient 90+ outgoing nights.
15 lb fluoro is the standard for offshore mangroves; 20 lb at bridges where they're cutting you on pilings. Trophy mangroves on a 12 lb leader are the prize of any reef trip.
Live small spiny lobster (when in season) is one of the best mangrove baits known. Use what you can — both anglers and bigger snappers know it.
12-month outlook
What they eat, what catches them
Live shrimp
Lights-out for bridge fish. Hook in the horn, free-line into the current.
Live pinfish or pilchards
Bigger reef mangroves prefer baitfish. 3–4" pinfish on a 2/0 hook.
Cut ballyhoo or squid
Reef chumming application — strip-baited to a small hook in the slick.
- Frozen sardines· Reliable when live bait is hard to find.
- Mullet chunks· Bridge fishing scent application.
- Soft plastic shrimp on jig· Bridge night artificial — pearl Z-Man or DOA shrimp.
- Bridge night, ripping current
Live shrimp on a 1/0 hook with just enough split shot to get it down. Float-rigged or free-lined.
- Reef chumming, bigger fish
Live pinfish on a 2/0 hook, fluoro leader, dropped deeper than the school.
- Pressured bridge fish
Live shrimp on a 12 lb fluoro leader and the smallest hook you can hold them on. Patience is the game.
How top captains rig it
Spin: 15–25 lb braid. Bridges: 30 lb braid sometimes.
3000–4000 size. Strong drag for bridge fish that try to break you on pilings.
Spin: 7' medium. Bridge: 7'6" medium-heavy with a strong butt.
15–20 lb fluorocarbon. Bridge fish sometimes 25–30 lb to keep them out of structure.
- Reef chumming
7' medium spin + 20 lb braid + 15 lb fluoro + small live or cut bait. Drift in the slick.
- Bridge night
7'6" medium-heavy spin + 30 lb braid + 25 lb fluoro + 1/0 hook + live shrimp. Free-line into the current.
Recreational rules
10" total length minimum.
10 per harvester per day; counts in 10-fish snapper aggregate.
Open year-round.
Spearing rules vary by zone; gigs and snatching prohibited.
Note · Often confused with cubera snapper as juveniles — cubera have a slightly different anal fin profile and grow much larger.
What actually moves the bite
Each factor is rated by how much it shifts the bite for this fish in the Keys. Calibrated against the Bite Score weights — see the Bite Score reference for what each factor measures.