Art Print: Manatee carcass with slice marks from boat propellers. The body of a dead manatee awaits necropsy in a Florida lab. This animals tail was cut severely during a collision with a boat propeller. Many of the slow-moving creatures are culled each year by boats that are going too fast in Florida's waterways. National Geographic Photograph by Joel Sartore, Florida. Buy this picture as an unframed print, a framed print, or a mounted box canvas print.