River otters live primarily in freshwater, though they do swim and hunt in seawater. They have visible ears, swim belly down, use webbed feet to paddle, and move swiftly on land and water.

So, yes, baby birds do have a belly button. But it's more like a temporary tattoo. You may be surprised by the answer.

A belly button or tummy button is technically known as a navel or umbilicus. Humans have belly buttons because before we are born, we are connected to our mothers via an umbilical cord.

Compared to other otters, sea otters have shorter and less muscular tails, with no marked tapering. While floating on its back, a sea otter can scull with its tail to turn. Like most other mustelids, freshwater otters have subcutaneous anal scent glands at the base of the tail.

No, otters do not have pouches. True anatomical pouches are rare in the animal kingdom. They are most associated with marsupials such as koalas and kangaroos. These pouches are used for rearing their young, protecting them from the environment outside since they are in a very underdeveloped stage.