Six Sheepshead on 1/2 of 1 Oyster

Every Sheepshead Angler Has Experienced This...

You're fishing beside a bridge piling.

You lower a fresh oyster to the bottom.

The rod tip twitches ever so slightly.

You lift the rod...

Nothing.

When you reel in, the hook is bare.

The oyster is gone.

The fish wins again.

If this has happened to you, don't worry—you aren't alone.

Every experienced sheepshead angler has had the exact same thing happen.

The question is...

Why?