Sea anemone , any member of the invertebrate order Actiniaria (class Anthozoa, phylum Cnidaria), soft-bodied, primarily sedentary marine animals resembling flowers. They are found from the tidal zone of all oceans to depths of more than 10,000 metres (about 33,000 feet). Some live in brackish water. Home Animals Cnidarians Sea Anemone : Characteristics, Diet, Facts & More [Fact Sheet] Sea anemones , nature’s underwater bouquet, are one of the ocean’s most captivating creatures. With their colorful and graceful appearance, they resemble delicate flowers, yet they are voracious predators with fascinating biology. This article explores the captivating world of sea anemones , detailing their classification, habitat, behavior, diet, reproduction, and more. Discover the fascinating world of sea anemones ! 🌊 Explore their biology, habitat, ecological roles, and symbiotic relationships in this detailed article. 🌟 Learn about the characteristics, digestive system, nervous system, life cycle and ecology of sea anemones, a group of marine animals that belong to the order Actiniaria. Find out how they reproduce, feed, defend themselves and form mutualistic relationships with algae.