Explore the fascinating world of sea monsters with this exciting guide to 50 aquatic cryptids by the creators of the bestselling Cryptid Creatures: A Field Guide. Cryptid Sea Monsters profiles 50 different aquatic cryptid mysteries around the world. Aspiring scientific explorers will discover that many ancient sea monsters turned out to be real creatures--like the oarfish, a real creature that inspired our legends about dragons--and learn about other cryptids that might one day turn out to be real. Each cryptid has a reality rating of 1 to 6 to show whether it's more of a hoax or something that has been discovered and recognized by science. This page-turning guide will inspire curious readers to investigate more on their own, and to understand the relationship between science and myth.