Blanket octopus pairs are some of the undersea world ... open ocean—in the Atlantic and Pacific oceans, as well as in Info-Pacific waters—and so never rest on the seafloor.

Add in the octopus’s small size (generally around eight inches), relatively short arms, bell-shaped body, pale coloring, and tendency to hover over the seafloor, and you’ve got a cephalopod ...

Award-winning author and ocean activist Mark Leiren-Young is bringing the mysterious world of octopuses to young readers in his new book, Octopus Ocean: Geniuses of the Deep.