An anemone is a type of marine animal belonging to the phylum Cnidaria. They are closely related to corals and jellyfish and are typically found in shallow ocean waters. Anemones have a cylindrical body and are often brightly colored, with tentacles that contain stinging cells called nematocysts, which they use to capture prey. Anemones can attach themselves to rocks or coral reefs and are known for their symbiotic relationships with clownfish. These fish find shelter among the anemone's tentacles, gaining protection from predators, while the anemone benefits from the nutrients provided by the clownfish's waste.