Red Jellyfish In S.E.A. Aquarium , Singapore Stock Photo

Sea jellies such as this one in the genus Benthocodon are commonly seen on or near the seafloor in the Monterey Canyon off central California. This photo took picture in S.E.A. Aquarium, Resorts World , Sentosa.Jellyfish or sea jellies[citation needed] are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles.