pacific sea nettle jellyfish closeup |
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| navigate by keyword : academy adventure ambient animal aqua aquarium aquatic background beautiful bite blue california closeup colorful creature danger dangerous dark deep defend dive downward exotic fish fluid gelatinous glow glowing isolated jellies jelly jellyfish life marine medusaphase medusozoa movements moving nettle ocean orange pacific phylum predators propulsion pulsate red science sea stinging subphylum swimming tentacles toxin tropical vivid water yellow |
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| Jellyfish and sea jellies 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, although a few are not mobile, being anchored to the seabed by stalks. The bell can pulsate to provide propulsion and highly efficient locomotion. The tentacles are armed with stinging cells and may be used to capture prey and defend against predators. Location: aquarium at California Academy of Science |
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