The correct option is D Sea anemone
Sea anemones are a group of water-dwelling, predatory animals of the order Actiniaria. They are classified in the phylum coelenterates, class Anthozoa. They show radial symmetry. Radial symmetry means that cutting in several planes produces roughly identical pieces. Radial symmetry is shown especially by sea anemones, jellyfish and slow moving organisms like starfish. Hence, option D is correct.