Otter with enrichment tube

In addition to their normal daily feedings, the otters are sometimes given additional nutrients in the form of a frozen tube like this one. Since the food isn't immediately available, the otters spend quite some time playing with the tubes, which look like anything from flotation tubes to beer bongs to snorkels.

June 23, 2012 6:43 AM PDT

Photo by: Daniel Terdiman/CNET

 

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