Thomas J. O'SheaThomas J. O'Shea is Scientist Emeritus at the U.S. Geological Survey, Fort Collins, Colorado. A mammalogist, he conducted research on manatees for many years and has served on the federal Florida Manatee Recovery Team, the Committee of Scientific Advisors to the U.S. Marine Mammal Commission and the IUCN Sirenia Specialist Group. Read More Read Less