Book excerpt: The body of a sea cucumber doesn't have many parts. Yet sea cucumbers help to clean the world's ocean floors and even help to reduce the effects of global warming. They do all of this without a brain. Exploring the life cycle of this invertebrate, this book covers some of the odd qualities of a sea cucumber, including the ability to expel part of its own intestine in order to escape predators. Sea cucumber abilities will boggle your readers' minds.