Nellie the Sea Otter, who rose to fame in 2012 for her cup stacking skills, has died at the age of 19.
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Nellie learnt how to stack cups before moving to the zoo. The practice was continued by her trainers keep her mentally sharp.
Officials at Point Defiance Zoo and Aquarium in Tacoma, Washington said that Nellie was euthanized after acute illness.
Let's all hope she finds an otter friend to hold her hand down the big river in the sky.
R.I.P Nellie, we'll miss you.
