Manatees and Dugongs of the World Author:Jeff Ripple "Manatees and Dugongs of the World" covers the four living species of the sirenian, as well as the extinct Stellar's Sea Cow. Jeff Ripple details the natural history of the sirenian, including evolution, range, movement and habitat use, physical description, senses, anatomy and physiology, and more. Also devotes a chapter to sirens in myth and ... more »tradition and a chapter to the protection of the sirenian.« less