Eastern Emerald Elysia rely on the algae Vaucheria litorea to complete its development. The sea slug retains chloroplasts from the algae in the cells of its digestive tract. Here, the chloroplasts ...

There are some truly weird creatures in this world, from bizarre animals that look like Frankenstein projects to legitimately ...

The leaf sheep is such a precious sea slug. What you’re looking at in the photos is the leaf sheep’s eyes and mouth, as well as its cerata. The cerata are the leaflike appendages that cover the leaf ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Researchers have ...

MBARI researchers have discovered a remarkable new species of sea slug that lives in the deep sea. Bathydevius caudactylus swims through the ocean's midnight zone with a large gelatinous hood and ...

The next time you head to the coast to enjoy the Tampa Bay waters, you may stumble upon a Pierce's Cyerce—a recently-discovered sea slug species that is being named after Sidney "Skip" Pierce, ...

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Around 100 million years ago, a group of sea snails abandoned the one thing that should have kept them alive—their shells. Instead of going extinct, they evolved into one of the strangest animals in ...

Somewhere beneath tropical waves, a sea slug the size of a house cat pulls off a move that stops divers cold. Meet the ...

Sea slugs are one of the world's most stunning, diverse, and adaptable animals. Not only are sea slugs beautiful to look at, but their methods of survival are unparalleled. While some marine species ...