Don the Whale (or simply just "Don") is a muscular orca whale who wears blue swim trunks and hangs out at Goo Lagoon. He is friends with Larry as seen in the episode "MuscleBob BuffPants." A weightlifter, he competed in the Anchor Toss Competition in the episode "MuscleBob BuffPants." He is strong and has a six pack because he works out so much. He hangs out at the bar usually just to listen about people's workout routines.
He is a muscular orca and has a black backside with dark gray arms and legs, and he has a dark white underside. He wears light blue shorts.
I can turn into a skyscraper!
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In one episode, someone says that Sandy is the only mammal in Bikini Bottom, but Pearl, Craig Mammalton and Don the Whale are also mammals. What that someone may possibly be referring to is that Sandy is the only land mammal.