This deep-sea ctenophore is about the size of a tennis ball and thrives two miles below the sea surface. Its scientific genus is Bathocyroe, which translates to “master of the deep.” University of ...

The original version of this story appeared in Quanta Magazine. The bottom of the ocean is cold, dark, and under extreme pressure. It is not a place suited to the physiology of us surface dwellers: At ...

When most of us picture the ocean, we imagine turquoise waves, colorful reefs, and shoals of darting fish. But that’s only the surface. Venture deeper, far below the last reach of sunlight, and you ...