Good job!
You almost got it!
But if you want to better know which is which - you can tell by:
The colour of their fur: River otters are dark brown and have sleek fur. Sea otters are also dark brown but with a much lighter head, and their fur is fluffy.
The length of their tail: River otters have a long, thick tail that they use to help move around in the water. Sea otters have a short tail.
The way they swim: River otters almost always swim in a dog paddle, and rarely swim on their backs. Sea otters almost always swim on their backs.
Where they are found: River otters spend half of the time in the water and the other half on land. Sea otters spend most of their time in the water and only go on land from time to time.
Try again to answer at least 8 questions correctly, and get a bonus code for the Earth Rangers App!