A MONSTER 20ft great white shark left a swimmer needing 30 pints of blood after mauling him in a horrific attack.
Witnesses described the water turning red as Steve Bruemmer, 62, was bitten at Lover’s Point Beach in California.
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He was hauled out of the water by hero bystanders while a group of children visiting from Kansas watched on in horror.
Just 150 yards from shore, the “very large” shark…