In this April, 3, 2012 photo provided by the Shedd Aquarium, Senior Director of Marine Mammals Lisa Takaki interacts with Kenai, one of the last two sea otters rescued from the Exxon Valdez oil spill ... more 
In this April, 3, 2012 photo provided by the Shedd Aquarium, Senior Director of Marine Mammals Lisa Takaki interacts with Kenai, one of the last two sea otters rescued from the Exxon Valdez oil spill in 1989. Shedd Aquarium officials said Wednesday Oct. 10, 2012 that they euthanized the 23 year-old, female sea otter, on Tuesday.(AP Photo/courtosy of Shedd Aquarium,Brenna Hernandez) less 
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Associated Press | Photo By courtosy of Shedd Aquarium,Brenna Hernandez
Wed, Oct 10, 2012 4:17 PM EDT