Jakob Christensson's book Water Creatures is an accessible account of the history of ideas and knowledge about animals that live their lives in the oceans and lakes or have their hunting grounds or reproduce there. It also describes how the West has viewed them from antiquity to the present day. After an introductory overview chapter, "At the edge of the water", each chapter describes twelve animals that have made their mark on the Western tradition of thought. It concludes with a chapter on Pliny the Elder, who had a major influence on scholars well into the 19th century. The crocodile, the leech, the eel, the crayfish, the shark, the sucker, the turtle, the octopus, the sole, the Steller's sea cow, the whale and the jellyfish are presented in turn. The reader will learn something new about humans as actors and observers in nature and about animals in their own right. The presentation crosses over between different subject areas and genres. Sometimes the emphasis is on aspects of the history of biology, sometimes geology or economics. In addition to non-fiction, sources include fiction, travelogues, newspapers, cookbooks and children's books. The book is about 320 pages long, abundantly illustrated (about 70 pictures, many of them in color), and is published in a hardcover book with a dust jacket. The book is published as a yearbook 2021 for the 2,200 members of the Swedish Humanist Association. The publisher is Bladh by Bladh AB.