Here's the The Complete Walrus Bucket Saga backstory:
What's 3,400 lbs and makes fart-noise vocalizations when asked? E.T., a 30-year-old Pacific walrus at Point Defiance Zoo & Aquarium in Tacoma, WA, who is one of only 17 walruses in U.S. zoos and aquariums. He came to the Tacoma facility as an orphan from Prudhoe Bay, Alaska, and is named "for his wrinkled resemblance to alien in the popular 1982 movie E.T. The Extra-Terrestrial."
I'd sure like to hear his rendition of "Trololo." [EDIT] OK. Here we go.
The zoo has a pretty great YouTube channel with more videos like this.