Common name: Barnacles

Sessilia, commonly known as barnacles, are a group of crustaceans that attach themselves permanently to a hard substrate. They are a common sight in marine environments, often found clinging to rocks, boat hulls, and even sea turtles. For reefkeepers, barnacles can add a touch of natural diversity to the aquarium, serving as a unique point of interest. They are filter feeders, which means they can help maintain water quality by consuming detritus and plankton. However, care should be taken as some species may compete with corals for space.