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

Dive into the depths of the ocean to discover seven rare deep-sea creatures so strange and elusive, you won't believe they ...

A newly discovered deep-sea creature has become an unlikely Internet star. After appearing in a popular YouTube video, a rare ...

Thousands of strangers on the internet just collectively named a deep-sea creature that lives on sunken wood at the bottom of ...

The Rock Pool Project in Plymouth says the non-native sea hare looks "alien-like".

CHARLOTTE, N.C. — A marine creature that resembles the alien E.T. has been found growing in a prehistoric area of eastern Pacific seafloor rock. The “E.T. sponge” has been classified as a new species ...

About 5,000 species of crustaceans in the order Isopoda live in Earth’s oceans. According to the National Oceanic and Atmospheric Administration, they all have two pairs of antennae, compound eyes, ...

Sea creatures have adapted to help them thrive in extreme environments. Unusual features allow them to live thousands of feet below the surface. Underwater robots give researchers a glimpse at some of ...

A scientist collected a marine invertebrate colony from northern Russia, raised it in an aquarium and discovered a new species, a study said. Screengrab from Getty / iStockphoto video In a laboratory ...