The Knoxville Zoo shared some sad news on Tuesday.
A zoo favorite, Otis the black bear, became sick and died suddenly last week. Veterinarians believe he died of acute onset pneumonia on Friday.
Otis, 15, came to the Knoxville Zoo in 2001 from the Fort Worth Zoo with Milo. The two young bears were found orphaned in Alaska in 1999, and could not be re-released into the wild.