Max is a baby seahorse that went off on his own adventure exploring the ocean one day. In Max's Underwater Mystery #1: Exploring the Oceans, he came across many different types of sea creatures and he didn't know what they were. So, Max decided to ask them, "Are you an underwater mystery?" Max wants you to come along and join him with exploring the oceans as you read and discover, with him, the many different types of sea creatures that live in the ocean.