Flats Fishing and Sight Fishing, Explained

A flat is a broad area of shallow water over sand, grass, mud or marl, usually near islands, bays, mangroves or marsh. At the right tide, fish move up onto flats to feed on crabs, shrimp and small fish.

Flats fishing is a form of sight fishing. Instead of dropping baits blind and waiting, you look for the fish, then present a fly, lure or bait right in its path. It feels more like hunting than most fishing. You might see only a handful of good shots in a morning, and each one counts.

• Quiet and visual. No engine running while you fish, just the guide poling and everyone scanning the water.
• Small groups. Most flats skiffs fish one or two anglers, taking turns on the bow.
• Fly or spinning gear. Flats fishing is famous among fly anglers, but spinning rods with light lures or live shrimp work well too. Tell your guide what you prefer.
• Mostly catch and release. Many flats fish are released, and some must be. See our catch and release guide for good handling.

You cannot catch what you cannot see, so polarized sunglasses are the one piece of gear you really need. They cut the glare off the surface so you can see into the water. Many flats anglers like amber, copper or brown lenses for general use, and a cap with a dark underbrim helps block stray light.

Spotting fish is a skill that takes time. Do not expect to see what the guide sees on day one. Watch for:

• Shapes and shadows. Often you see a fish’s shadow on the bottom before the fish itself.
• Movement. Something gray sliding across a light bottom.
• Tails. Bonefish, redfish and permit often tip down to feed in very shallow water, and their tails break the surface. This is called tailing.
• Nervous water. A ripple or push on calm water that does not match the wind.
• Muds. Puffs of cloudy water where fish are rooting in the bottom.

Conditions matter a lot. High sun, light wind and clear water make spotting easier. Heavy clouds and strong wind can make it very hard, which is why guides watch the forecast closely.

Tides run flats fishing. On many flats, a rising tide floods new water over the shallows, and fish push up to feed on crabs and shrimp that were out of reach at low water. As the tide falls, fish slide off the flat into deeper edges and channels. Some flats fish well on an incoming tide, others on a falling one, and guides learn their spots tide by tide.

That is why flats guides often set start times around the tide, not the clock. If you want to understand the plan, our guide on how to read a tide chart walks through the basics. You can also see a live tide curve and 7-day tide table on coastal report pages, such as the Key West fishing report.