The Bikini Bottom Triangle is an island that was seen in the episode "Welcome to the Bikini Bottom Triangle." The Mermaids were the first people to settle there. The island contains lots of items taken by the mermaids via singing to activate a giant vacuum. When they sing their song backwards, there items is returned to its owner.
The Bikini Bottom Triangle is a reference to the Bermuda Triangle.
"We paid ten dollars for this?"
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