Jellyfish are fascinating creatures of the sea. They come in a variety of shapes and sizes, and can be found in oceans all around the world. Jellyfish use their tentacles to capture prey and defend themselves from predators. They have no brain, heart, or bones, and rely
From Wikipedia
Jellyfish, also known as sea jellies or simply jellies, are the medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals, although a few are anchored to the seabed by stalks rather than being motile. They are made of an umbrella-shaped main body made of mesoglea, known as the bell, and a collection of trailing tentacles on the underside.