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Portuguese man o’ war have been spotted on Spanish beaches, forcing the temporary closure of some popular shorelines last year ...

The so-called immortal jellyfish resembles a tiny, hairy thimble and lives in the Mediterranean Sea and also off Japan. Members of the species can reverse the aging process so that instead of ...

After the last Ice Age, sea levels rose and trapped jellyfish in the lake. Now, millions of golden and moon jellies cross it daily. According to the National Wildlife Federation, the lake is home ...

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Larvae mature into polyps, which will then bud off and mature into young jellyfish.' An adult jellyfish is known as a medusa. Jellyfish belong to a group called Cnidaria, which also includes sea ...

The infamous box jellyfish developed its frighteningly powerful ... Box jellies, also called sea wasps and marine stingers, live primarily in coastal waters off Northern Australia and throughout ...

The park’s “Jewels of the Sea: A Jellyfish Experience” opened to the public Saturday as a way to inspire and educate guests about the life and nature of sea jellies. Shortly after the park ...

Thousands of electric blue, jellyfish-like sea creatures washed up on Central Coast beaches this week. Known by the nickname of by-the-wind sailors, velella velella are hydrozoans — a species ...

At low tide, we hunted for crabs and mollusks entranced by the brilliant colors of barnacles, urchins, fish, and other sea creatures, but we also collected jellyfish that had been washed up by the ...