The sea creature known for its tentacles and ability to sting is the jellyfish. Jellyfish are marine animals that belong to the phylum Cnidaria and are characterized by their gelatinous, umbrella-shaped bell and trailing tentacles. The tentacles often contain specialized cells called nematocysts, which deliver a painful sting to capture prey and deter predators. Many species of jellyfish are found in oceans worldwide, exhibiting a variety of shapes, sizes, and colors. While some jellyfish stings can be harmful or even fatal to humans, others may cause only mild irritation. Their unique anatomy and fascinating lifecycle contribute to their status as captivating ocean dwellers.