Sea otters are members of the weasel family. Some male sea otters weigh up to 100 pounds, but most are 70 to 90 pounds. Female sea otters weigh 40 to 60 pounds. Sea otters have hind feet that are webbed, they use the feet for swimming. The front toes are stiff and short and are used to handle food.
Sea otters mate at all times of the year.
Usually sea otters have their pup in late spring. A pup is a light brown color and weighs three to five pounds. The year the female cares for the pup, the pup travels with her nad stays close by at almost all times. By the time the pups are weaned they look full grown and weigh up to 30 pounds. A female has a pup about every two years.