The blue glaucus is a brightly colored nudibranch. This tiny sea slug spends most of its life floating upside-down. Learn more about this unique species.

Enjoy these animated GIFs of deep-ocean creatures that wound up in the sub's LED beams—many of them likely experiencing bright light for the first time.

Pinnate Batfish adults are normally solitary but will gather in large schools to move over open substrates. The juveniles are mimics of a toxic species of flatworm by colour and shape. They feed on a…

35 Exquisitely Stunning And Unique Sea Slugs Images That Will Mesmerize You - World's largest collection of cat memes and other animals

<p>There are about 300 species in North America with this shocking trait.</p>