Shark Eye Shell on Sanibel Island

SHARK EYE SHELL

On Sanibel, the shark eye shell is one of those finds that stops people mid-step. It’s immediately recognizable because of its bold, dark spiral at the center, set against a smooth, rounded shell. That clear contrast is what makes it a favorite early on. For new shellers and longtime beach walkers alike, it’s an easy shell to recognize and one that stands out clearly against the sand.

The shark eye shell is thick and nearly circular, with a low, tight spiral and a solid feel in the hand. Its surface is smooth and polished by the water. The shell comes in two simple base colors—orange-tan or blue-gray. Marbled into those base tones are darker irises of orange, maroon, purple, or blue, usually concentrated around the central “eye.” The contrast between the lighter outer shell and the darker center is what gives this shell its name.

Shark eye shells vary widely in size and color, from pale cream to soft gray and warm tan.

The shark eye shell comes from a carnivorous sea snail. These snails prey on other mollusks, slowly drilling through shells to feed. If you come across other shells with a small, round hole cleanly drilled through them, it may be a sign that a shark eye once fed there. It’s an unexpected detail that adds depth to what many people first notice simply for its beauty.

You’re most likely to find shark eye shells after strong tides or storms, when heavier shells are pulled up from deeper water. Look along the wrack line (the natural line of seaweed, shells, and debris left behind by the tide) or near the edge of the surf, where rolling waves deposit thicker shells. Many shark eyes show chips or wear from tumbling in the water, so finding a clean, intact one takes patience and a careful eye..

Ranking: Common find on Sanibel.

The shark eye is considered a Common Find on Sanibel Island. Not rare, not overlooked—simply part of the beach landscape.

Finding a shark eye shell on Sanibel has a steady, grounding feel to it. It’s not rare, but it’s beautifully made, and it rewards slowing down and paying attention—whether this is your first beach walk or one you’ve taken many times before.

As always, shelling on Sanibel comes with responsibility. Florida law protects live shells—if an animal is still inside, it must be left on the beach. Only empty shells may be collected. When walking the shoreline, it’s also important to refill any holes you dig while shelling, helping to protect nesting shorebirds and sea turtles that depend on undisturbed beaches, and keeping the shoreline safe for everyone who comes after.