Meet Grimpoteuthis!

The deep sea is the largest ecosystem on earth, plunging to more than 37,000 feet below sea level at the Marianas Trench in the Pacific. It accounts for 85 percent of the space where life can exist and holds an estimated ten million or more species. "But we're still trying to figure out what's out there," says marine scientist Nancy Knowlton of the Smithsonian's National Museum of Natural History.

A new book, The Deep (The University of Chicago Press), by French documentary film producer Claire Nouvian, may be the most comprehensive look at this mysterious world that we surface dwellers will get for a long time. The more than 200 photographs—most taken by scientists from submersibles and ROVs, some shot for the book—show just how head-shakingly bizarre life can be. The scientists who discovered the creatures were apparently as amused as we are, giving them names such as gulper eel, droopy sea pen, squarenose helmetfish, ping-pong tree sponge, Gorgon's head and googly-eyed glass squid.

Find out more at The Smithsonian Magazine.

Grimpoteuthis Claire Nouvian sea The Deep