Gooseneck barnacles, Nakwakto Rapids, British Columbia A barnacle is a type of arthropod belonging to infraclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters.
An image from the 2013 Olympus BioScapes competition submitted by Mr. Waldo Nell - Specimen: Barnacle cirri with diatoms. Technique: Fluorescence, focus stack of 46 images