Alex Mustard / Florida manatee (Trichechus manatus latirostrus) being cleaned by blue gill sunfish (Lepomis macrochirus). Three Sisters Spring, Crystal River, Florida. USA. February 2010

Alex Mustard / Bluegill sunfish (Lepomis macrochirus) sheltering beneath a Florida manatee (Trichechus manatus latirostrus). Crystal River, Florida, USA.

Alex Mustard / A Florida manatee (Trichechus manatus latirostrus) scratches its back on rocks on the bottom of the river. Crystal River, Florida, USA. February 2010

Alex Mustard / Young Florida manatee (Trichechus manatus latirostrus) keeping warm in a freshwater spring in winter, Three Sisters Spring, Crystal River, Florida. USA. January

Alex Mustard / Pair of Florida manatees (Trichechus manatus latirostrus) surfacing to breathe in murky water in Three Sisters Spring, Crystal River, Florida. USA. January