The sea creature — which was first spotted in 2002 in a deep-sea volcanic structure in ocean waters south of Tokyo, Japan — has a bright red "X" on its stomach.

The brilliantly named Pacific sea nettle is a red-tinted jellyfish that lives in the northeastern Pacific Ocean. Taking its name from its sting, ...

Known as a Lion’s Mane Jellyfish, the animal is a member of the largest jellyfish species in the world, according to the ...

Art often imitates life, and sometimes animals do, too. The enormous jellyfish seen in this YouTube video bears a striking ...

As for the unique red cross, Morandini said it "probably has to do with capturing food." Scientists say they have found a new species of Medusae — a type of free-swimming, umbrella-shaped jellyfish.