Bonefish.
Flats ghost. The patience-and-presentation fish.
How they feed in the Keys
The Florida Keys hold the largest bonefish in the world — averages here run 6–10 lbs, with double-digit fish realistic. Bones tail and mud across hard-bottom flats from Biscayne south through Marathon, with the Marquesas and Lower Keys back-country holding the most pressured but biggest-fish populations. They feed by pushing tide onto the flat and rooting for shrimp, crabs, and small worms. The bite is presentation-driven: a 60-foot lead on a moving fish, a soft splash, and the right speed of strip. Spook one and the whole school evaporates.
72–82°F
Active 68–86°F · Shut down below 65°F or above 88°F
Strong preference for incoming tide pushing onto a flat — bones ride the pushing edge with the bait. Mid-flood is the prime window. Outgoing produces in cuts and mangrove drains where they ambush bait coming off the flat.
Wants water moving across the flat, but not ripping. A flat with gentle to moderate current carries scent and bait without spooking fish. Slack water on a calm flat tends to be empty.
Sun for sight fishing — without contrast you can't see fish. Wind below 12 mph keeps the surface readable; under 8 mph is ideal for clean tails. Pre-front falling pressure can spark aggressive feeds; the day after a hard front is usually dead.
Stable to slowly rising is best. A sharp pressure drop in the 6 hours before a cold front is the only window I'd take a falling barometer. Post-front high pressure with a north wind is the worst combination.
Dawn (calm, low-glare tailing window) and last light are peak. Mid-day fish in clear shallow water need the right sun angle behind you. Don't give up on overcast days — the fish are there, just harder to spot.
Spring tides around full and new moon push bigger fish onto the flats. The downside: water can be too high mid-day on big spring tides — fish move so far up into the mangroves you can't reach them. New-moon dawn tides on a soft incoming are the bonefish guide's favorite combination.
Coefficient 80+ on full/new moon = epic flats fishing if water clarity holds. Coefficient 40–60 = small-water tides with concentrated fish in known channels. Coefficient under 40 = neap tide, hard to find.
An onshore breeze pushing bait onto the flat is good; a hard offshore breeze flushing the flat is bad. East/SE winds dominate the Keys; that's a productive direction.
Most consistent bonefish guides start clients on spin (live shrimp on a 1/16-oz jig) and move to fly when the fundamentals click. The fish don't care; the angler's accuracy does.
12-month outlook
What they eat, what catches them
Live shrimp
On a 1/16–1/8 oz jig head. The most-used bonefish bait in the Keys. Cast it three feet ahead of a moving fish and don't move it.
Small live crab
Pass crab or quarter-sized blue crab. Excellent for tailing fish on a hard-bottom flat. Slow drag.
Gotcha or Crazy Charlie fly
Tan or pearl, weighted #2–4. The two flies that have caught more Keys bones than everything else combined.
- Merkin / Bauer crab fly· When bones are tailing on crabs in skinny water.
- Berkley Gulp! shrimp· Backup when live bait is limited. Less natural, but works in a pinch.
- Yo-Zuri Crystal Minnow· Subsurface twitch bait for cruising fish in clearer cuts.
- Calm dawn, tailing fish
Fly only — anything else lands too hard.
- Wind chop, blind cast
Live shrimp on a jig — gives you weight to cast and a profile fish can find.
- Mid-day cruising fish
Live crab or weighted crab fly. Land it in their lane and let it sit.
How top captains rig it
Spin: 8–12 lb braid. Fly: weight-forward floating, 12–16 lb tippet.
Spin: 2500–3000 size. Fly: 8wt with 200+ yards of 20 lb backing — bones run.
Spin: 7' medium-fast. Fly: 9' 8wt for normal fish, 9wt if you've been pulling 8-pounders.
20–25 lb fluorocarbon tapered to 12–15 lb tippet. Long leaders (10+ ft) for skittish fish in clear water.
- Skiff sight fishing
Spin: 7' medium with 10 lb braid + 20 lb fluoro leader. Fly: 8wt + floating + 12 ft tapered leader.
- Wading
Same fly setup but with a stripping basket. Slower, stealthier, often more productive than a poled skiff for educated fish.
Recreational rules
Catch-and-release only — no harvest.
0. Bonefish are designated catch-and-release in Florida.
Year-round catch-and-release.
Spearing, snatch hooks, and any harvest. Treble hooks are legal but barbless single hooks are recommended for release survival.
Note · Keep fish wet, support horizontally, minimize air time. A hot summer day after a long fight can kill an exhausted bone — revive in moving water until they kick free.
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.