The Pittsburgh Zoo and Aquarium’s 18-year-old sea lion Seahawk died Friday.

Seahawk, or Hawk, was rescued in 2006 after being orphaned off the coast of California as a pup.

“He quickly became a favorite at the zoo,” a post on the zoo’s Facebook page read. “(He) enjoyed a great bond with keepers and guest alike.”

Hawk had been exhibiting unusual behaviors and refused food for several days prior to his death.