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Atolla Jellyfish from the Waters of Japan

Preview This deep-sea jellyfish was caught on film by an ROV east of Izu-Oshina Island, Japan.
(JAMSTEC)

The ROV Hyper Dolphin caught this deep-sea jelly (Atolla wyvillei) on film east of Izu-Oshina Island, Japan. When attacked, it uses bioluminescence to "scream" for help—an amazing light show known as a burglar alarm display. Visit the Encyclopedia of Life to learn more about these wild jellies.