Tentacled sea creatures are a group of aquatic animals that have tentacles, which are long, thin, flexible appendages used for grasping and manipulating objects. This group includes anemones, hydras, octopi, and polyps. Anemones are invertebrates with a soft body and tentacles that are used to capture prey. Hydras are small freshwater animals that have tentacles and can regenerate lost body parts. Octopi are cephalopods with eight arms and two tentacles that are used to catch prey. Polyps are invertebrates with a cylindrical body and tentacles that are used to capture food particles.