"A book full of wonders" --Helen Macdonald, author of H Is for Hawk "Witty, insightful. . . .The story of jellyfish. . . is a significant part of the environmental story. Berwald's engaging account of these delicate, often ignored creatures shows how much they matter to our oceans' future." --New York Times Book Review Jellyfish have been swimming in our oceans for well over half a billion years, longer than...