These creatures are so fragile that the moment they are pulled out from the water, they collapse and disappear.

With tentacles trailing up to 120 feet, the lion's mane jellyfish is basically the deep-sea version of Rapunzel—if she could sting. Its bell can reach 8 feet wide, and those glowing tendrils help it ...

There are thousands of different species of sea anemones in the ocean with some living as far deep as 32,000 feet. Anemones are marine invertebrates that are closely related to jellyfish. This ...