Learn about the history of sea monsters in this photographic nonfiction leveled reader perfect for kids interested in the natural - and unnatural - world! Did you know that the legendary Hercules fought against the hydra, a sea monster with many heads? Or that the giant squid may not sink ships like the hydra, but it is still powerful enough to use its 30-foot-long tentacles to turn a whale into prey? That means that enormous creatures still lurk...