Goose Barnacle

ocean creature · crustacean · weird anatomy

Stalked filter feeders. Goose barnacles are crustaceans that stick to rocks and floating wood using a bendy stalk, kind of like a tiny alien on a leash. They spend their whole lives in one spot, waving their feathery legs to catch tiny bits of food from the water.

Armored caps. At the end of each stalk is a hard, armored shell called a capitulum that protects the barnacle's soft body inside. When the waves crash, the shell snaps shut to keep the creature safe from danger.

Clinging to flotsam. These barnacles don't just stick to rocks, they also grab onto pieces of driftwood, ship hulls, and even whales. They're so good at hitching rides that they travel across entire oceans on floating debris.

Eaten by people. In Spain and Portugal, goose barnacles are considered a fancy seafood treat called percebe, and they can sell for a lot of money. Divers risk their lives collecting them from dangerous, wave-battered rocks.

Named oddly. The name 'goose barnacle' comes from an old false belief that these creatures could somehow turn into geese, which seems pretty wild now that we know the facts.