Yellowtail Snapper.
Reef-edge schoolers. Light leader, hard chum, all-day fun.
How they feed in the Keys
Yellowtails are the bread-and-butter Keys reef fish — schools of 1–3 lbs hover above hard bottom in 60–120 feet, rising to a chum slick with embarrassing predictability. Bigger "flag" yellowtails (4–7 lbs) hold deeper or pull off to the up-current edge. The Atlantic reef tract from Hawk Channel through the Marquesas is wall-to-wall yellowtail habitat. The fishery is current-driven: a strong tide carries the chum slick, the slick brings the school up, and a light leader with a small hook does the rest.
74–82°F
Active 68–86°F year-round
Strong incoming or outgoing — both work. The slick has to move. Slack tide kills the bite within 20 minutes.
The single biggest variable. 1–2 knots is perfect. Drift fishing on a loose anchor lets the chum cone form behind the boat.
Calm to moderate seas. Light wind chop is fine; 4+ ft seas make anchoring on the reef edge hard. Pre-front falling pressure produces aggressive flag-yellowtail bites at dawn.
Stable to falling. A sharp pressure drop ahead of a summer thunderstorm can light the reef on fire.
All day. Dawn for the biggest fish (flags), mid-day for numbers, night for big-mama schoolers and the occasional grouper bonus.
Full moon July–August spawning aggregations on the deeper edges produce the biggest fish of the year. Dark-of-the-moon nights are the best night-fishing window.
70+ supports the slick; under 50 you'll struggle to chum effectively.
12 lb fluoro is the Keys yellowtail-guide standard. 15–20 lb produces fewer bites. Cut a fish off on coral? Re-tie. Don't go heavier.
Float-rig drifted back in the slick + a knocker rig dropped straight down. The knocker rig finds the deeper bigger fish while the float keeps fish stacking on top.
12-month outlook
What they eat, what catches them
Live pilchards
Bigger fish prefer live bait. Net-caught pilchards in summer = trophy flag yellowtails.
Cut ballyhoo strips
Thin diagonal strips, threaded onto a #1–2/0 hook. The everyday yellowtail bait.
Small jig + shrimp tip
1/4-oz jig with a piece of fresh shrimp tipped on the hook. Drifted in the slick.
- Live shrimp· Reliable in cool water. Bigger fish often prefer ballyhoo.
- Squid strips· Tough, stays on the hook through current.
- Cut bonito chunks· Strong scent for the chum slick.
- Daytime numbers fishing
Cut ballyhoo strip on a #1 hook, 12 lb fluoro, light split shot to keep it down in the slick.
- Dawn flag-fishing
Live pilchard on a 1/0–2/0 hook, drift it deeper than the school's holding depth.
- Night fishing
Squid strip on a small jig under a glow stick. Big fish move shallow after dark.
How top captains rig it
Spin: 12–20 lb braid main. Conventional: 15–20 lb mono OK.
Spin 3000–4000 size. Smooth drag matters — yellowtails make repeated short fast runs.
Spin: 7' light to medium-light, fast tip. Sensitive — bite is subtle.
12 lb fluorocarbon, 4–6 ft. Top guides go even lighter (10 lb) for finicky fish on calm days.
- Standard reef chum
7' light spin + 15 lb braid + 12 lb fluoro leader + #1 hook + small ballyhoo strip + chum block in the bag.
- Big flag fish
7' medium spin + 20 lb braid + 20 lb fluoro + 2/0 hook + live pilchard. Drop deeper, away from the boat.
Recreational rules
12" total length minimum.
10 per harvester per day; counts within the 10-fish snapper aggregate.
Open year-round.
Spearing legal in many areas; gigs and snatch hooks prohibited.
Note · 10-fish snapper aggregate covers all snappers combined — yellowtail, mangrove, mutton, etc.
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.