Sea Monsters: A Nonfiction Companion to Magic Tree House #39: Dark Day in the Deep Sea (Magic Tree House (R) Fact Tracker)

How are an octopus and a squid different? What kinds of creatures live in the deepest abyss of the ocean? What do scientists say some legendary sea monsters really are? Find out the answers to these questions and more in this Magic Tree House Fact Tracker: Sea Monsters.