The term 'Tentacled Marine Creature' can refer to an ANEMONE (7 letters) or a Seaanemone (10 letters). Anemones are predatory marine animals that live in the ocean and have a soft body with tentacles. They are related to jellyfish and corals and are found in all oceans around the world. Seaanemones are a type of ANEMONE that live in shallow waters and attach themselves to rocks or other surfaces. They have a wide variety of colors and shapes and feed on small fish and crustaceans.