The nice thing about snorkeling: with ease anyone can experience the fascinating underwater world. With the right background knowledge, this adventure becomes even more fascinating: in which cracks in the rock could an octopus be hiding? Which tracks in the sand show that a robber is disguising itself here? When, and using which technique, do fish not take to their (figurative) heels? Organized by coastal formations - shallow water, sandy bottom, rocky coast - this book supplies the right tips and information for memorable discovery tours while snorkeling. Bernd Humberg is a graduate biologist and diving instructor. He works at various ocean biology stations. He began his journalism career as editor-in-chief of the trade magazine Divemaster. He is co-author of the successful KOSMOS book What lives in the Mediterranean?