Anemones

Sea anemones are named after and resemble flowers, but they’re actually invertebrates related to corals and jellies. They have a single adhesive foot that they use to grab hold of things like rocks, shells, or anything stable enough to hold them. Anemones are carnivorous, but form a symbiotic relationship with clownfish that protect them within their tentacles that the clownfish show their appreciation for by dropping their crumbs and leftovers for the anemone.