Thornton is a polar bear, who is permanently on vacation. Since drifting into the lagoon on an iceberg, he decided he would spend his winters on Kapupu Island: reading on the beach, sipping on a cocktail.

Thorton appears in the newspaper comic ‘Sherman’s Lagoon’, drawn by Jim Toomey. As of 1991, a group of sea animals experience all kinds of adventures: Sherman the Shark, his wife Megan and son Herman. Fillmore the Turtle and his adopted son, Clayton. Hawthorne the Crab and Ernest the Fish.