Every few years, millions of by-the-wind sailor jellyfish wash up on beaches and die. What is causing so many of them to become stranded? The blob could be to blame.
The water surrounding upside-down jellyfish often stings to the touch, and now scientists know why.
The barrel jellyfish is named for its massive size and silly-looking head, but it's rare for researchers to get up close and personal with one. Two divers in the U.K. recently had the chance.
A weird, brilliant blue creature with feathery-like strands is washing ashore onto the beaches of New Jersey.
A remotely operated vehicle named Hercules filmed a rarely seen jellyfish that looks like a cross between an alien and a pinkish makeup bag.
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