Shortlisted for the 2019 Kate Greenaway Medal, this stunning book by Yuval Zommer answers questions such as: Why do octopuses have eight tentacles? Why do crabs run sideways? Are jellyfish made of jelly? His quirky illustrations reveal various amazing sea creatures, including sea turtles, whales, sharks, albatrosses, and seahorses. Filled with astonishing facts and humor, it's the perfect book for children curious to discover the most exciting creatures from the depths of the sea.