One of the mammals from the Pantanal that I did have a lot of luck with were the giant river otters. They seemed to be everywhere, as did their much smaller cousins, the neotropical river otters. Here are just two of the many photos that I took (more to come). In the top shot, a couple of giant river otters share a catfish. In the bottom photo, I wanted to show just how large and muscular they can be (up to 6 feet in length and 100 pounds). Because of their massive size, they’ve been nicknamed “river wolf” and “water dog.”