Amazing Jellyfish swimming underwater - pretty ocean creatures - relaxing ocean sounds

The medusa-phase of some gelatinous species of the subphylum Medusozoa, a key portion of the phylum Cnidaria, is referred to as jellyfish or sea jellies. Jellyfish are mostly free-swimming marine organisms with umbrella-shaped bells and trailing tentacles, while a few are stalk-anchored to the seafloor. The bell has the ability to pulse in order to create propulsion for extremely efficient mobility. The stinging cells on the tentacles can be utilized to catch prey and protect against predators. Jellyfish have a complicated life cycle; the medusa is the sexual phase, which produces planula larvae that spread far and undergo a sedentary polyp phase before sexual maturity.