The Point Defiance Zoo and Aquarium in Tacoma reports that Qannik (kah-NICK), an 8-year-old beluga whale, has died after suffering an unidentified infection.

An aquarium news release says Qannik died Saturday evening after showing signs of illness since March 15, including a loss of appetite and significant weight loss.

Staff treated him with antibiotics, fluids and high-calorie nutrients, but tests and consultations with veterinarians failed to determine source of the illness.

Veterinarians will perform a necropsy.

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Qannik arrived in Tacoma in June 2007 from the Shedd Aquarium in Chicago.

Point Defiance has one remaining beluga, Beethoven.