Some examples include:
* Barnacles: These crustaceans attach themselves to rocks, boats, and other surfaces in the ocean.
* Corals: These marine invertebrates form colonies and build reefs by secreting calcium carbonate.
* Sponges: These filter-feeding animals are attached to rocks and other surfaces in both freshwater and saltwater environments.
* Oysters: These bivalve mollusks attach themselves to hard surfaces in the ocean.
While some sessile organisms may move slightly, they are generally unable to move independently over long distances.
