Chthamalus

Chthamalus is a genus of small marine barnacles, crustaceans that attach permanently to surfaces like rocks, ships, and piers in coastal environments. They have hard, shell-like plates that protect their soft bodies. Chthamalus barnacles filter plankton and tiny particles from the water for food. They are important in ecosystems as both grazers and prey. These barnacles are often found in the upper intertidal zone, where they withstand exposure to air and changing tides. Their presence indicates healthy, stable coastal habitats, and they play a role in the biodiversity of marine communities.