Nominated for the 2019 Kate Greenaway Medal Why do octopuses have eight arms? Why do crabs run sideways? Are jellyfish made of jelly? Yuval Zommer's beautiful new book provides the answers to these and many more fishy questions. His wonderfully quirky illustrations show off all kinds of slippery, shimmery and surprising sea creatures, including sea turtles, whales, sharks, rays and seahorses.