Marine biologists help preserve our oceans and the habitats and creatures that call them home. By observing how sea creatures behave and how they connect with the environment through research, testing, and tagging, marine biologists try to save endangered species to make sure they are here for everyone to enjoy for generations to come! This title will allow students to see that science involves the use of tools to observe and measure things. * Content sidebars * Maps * Text based questions * Bold keywords with phonetic glossary.