Monterey Bay Aquarium
Monterey Bay Aquarium: Sea Otters
A resource that explores the otter's life at sea with emphasis on keeping warm, diet, social life, and mother and pup. A live cam is set up to view the sea otters. Other sites (Marine Mammals and Octopus's) can be accessed.
University of Michigan
Bio Kids Critter Catalog: Mammals
This comprehensive site defines mammals in general and then focuses specifically on mammals found in southeastern Michigan. A complete description is given of each mammal along with pictures, sounds, specimens, and classification...