Do you know that water covers nearly 70 percent of the earth, and that more than half of the earth's species live in water? With its witty pen and ink illustrations, each page of this activity book engages readers of all ages with fun facts about the intricate world of the sea. Readers learn to fold an origami boat, sketch fantastical fish, and draw daring tattoos on a sailor's arm, while discovering more about the substance that is so essential to our lives that it's sometimes called "Adam's ale".