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Jellyfish

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Jellyfish 101 | Nat Geo Wild

Live Jelly Cam - Monterey Bay Aquarium

1:51

The Jellyfish | Kids Songs | Super Simple Songs

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JEFFERY DALLAS - Jellyfish

Live Moon Jelly Cam - Monterey Bay Aquarium

Jellyfish, jellies or 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. Jellyfish have a complex life cycle; the medusa is normally the sexual phase, the planula larva can disperse widely and is followed by a sedentary polyp phase.
    • Names 

    • Mapping to taxonomic groups 

    • Anatomy 

    • Largest and smallest 

    • Life history and behavior 

    • Ecology 

    • Relation to humans