USS Indianapolis (CA-35) U.S. Navy

A feeding frenzy took place after a Japanese submarine torpedoed the USS Indianapolis on July 30, 1945 during World War II. Some 900 American sailors were stranded in shark-infested waters, where an estimated 50 men a day were ripped apart by the sharks. It was the largest shark attack in US history. (Courtesy of PBS Thirteen and YouTube)
uss indianapolis (pbs thirteen)
CAPT Robert McMahon