stalked barnacle

A goose barnacle is a type of barnacle that attaches to surfaces like rocks, logs, or ship hulls by a leathery stalk. Barnacles are sedentary marine crustaceans that typically have a calcareous shell. They are covered with plates and attach themselves head-down to various surfaces, trapping food particles with feathery, retractile organs called cirri.123

Goose barnacles belong to the superorder Thoracica, which also includes acorn barnacles. Pedunculate barnacles, like goose barnacles, have their bodies elevated above the substrate by a peduncle, which can be armored. These barnacles are found worldwide and can be important fouling organisms on ships. Larval dispersal is generally limited, but some species can travel greater distances by attaching to larger animals or floating objects.2134