You "otter" know something about the creatures in today"s photo. They"re a pair of North American river otters swimming in Maine"s Acadia National Park. Technically members of the weasel family, these "water dogs" aren"t just locked into rivers. They can be found in other waterways and along the coasts of North America. A myopic animal with eyesight adapted to help with swimming, river otters will come right up on humans or boats, usually within a few feet.