The Deep


…Any world map shows that the earth’s surface is about 75 percent ocean. But it’s easy to forget that the seas are, on average, 2 1/2 miles deep. On land, animals live on the ground or within about 200 feet of it. In the ocean, animals live at the surface, or at the bottom of the deepest trenches, 6 1/2 miles down. Multiplied out, that means 99 percent of the space inhabitable by the earth’s animals exists in the oceans…

The Deep: The Extraordinary Creatures of the Abyss and Tony Koslow’s The Silent Deep: The Discovery, Ecology, and Conservation of the Deep Sea.