Giant River Otter, Pantanal, Brazil

I had some nice late-day light when this giant river otter swam past my boat in the Pantanal of Brazil. Unlike most other members of the mustelid family, these otters are highly social and live in large groups — sometimes as many as twenty individuals, although usually about eight or so. Nikon D300 with Nikkor 200-400mm lens and 1.4 teleconverter (for 550mm) ISO 1600, f/5.6 at 1/400th of a second.