Jellyfish: 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 ...

Box jellyfish are about the size of a grape. Jan Bielecki In the warm waters of the Caribbean, box jellyfish carefully dodge the roots of mangroves while hunting for small crustaceans to eat. Whether ...

At the time of this writing, the video (archived) had received more than 124,000 views. While we were unable to determine the creator of the video, it did not show a real jellyfish and was likely ...