Goose barnacles live attached to rocks, ships, ropes or flotsam floating out at sea. They've even been spotted on a chunk of spaceship that washed up in the Isles of Scilly.

Much like their claw-bearing brethren, goose barnacles are considered a delicacy, especially in Portugal and Spain, where they’re referred to as percebes and served with melted butter.

This is not my kids' first time eating something weird from the ocean. A year before their experience with goose barnacles, I had taken them periwinkle, or sea snail, foraging on the coast of Maine.