OG (old school) Shark repellent. The black plastic bag and how it works. - Master Watermen
WWII-era US Army-Issue Shark Repellent - Intended to protect airmen and seamen adrift at sea, it was made of black dye, decomposing shark flesh, and ammonium acetate. However, no record exists of
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Spaceflight and Surviving Shark Attacks | National Air and Space Museum
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Shark Repellent" Tote Bag for Sale by ijoshtherefore | Redbubble