Sea otters have the densest fur of any mammal and, unlike most other marine mammals, replace their fur throughout the year instead of undergoing a seasonal molt (Tarasoff 1974; Williams and Allen et al., 1995). Sea otters have guard hairs and many fine under-hairs that are microscopically interlocked in order to trap air and thus provide waterproofing, thermal insulation, and buoyancy.

In what ways do humans impact otters directly?  Here you will find information about boat strike injuries, common wounds associated with fishery interactions, and more!