(Newport, OR) -- A popular harbor seal at the Oregon Coast Aquarium in Newport has been euthanized after tests revealed throat cancer. Boots was taken to the Veterinary School at Oregon State University where they initially thought Boots only had an ulcer that was treatable. Results from a biopsy came back and showed there was also cancer, so the 35-year-old seal was euthanized. Boots was found stranded as a pup on a beach in Mexico in 1988, treated at Sea World San Diego and then transferred to the Oregon Coast Aquarium in 1992.