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Underwater Circles Created By Male Pufferfish

Crop circles in fields are made by UFOs, according to conspiracy theorists. Underwater crop circles are not so controversial. They are created by male pufferfish to attract mates!

Underwater Circles Created by Male Pufferfish, Males flap their fins as they swim to disrupt sediment, making ornate circular patterns that take them up to ten days to create. Once they have laboriously created their designs, the male pufferfishes wait. A female pufferfish will swim into the center if it catches her eye. Mating can then begin!

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