Flakes of Crab and Shrimp Shells Provide a New and Effective Way of Clotting Arterial Bleed

...The real magic of Celox is that it doesn't actually form blood clots, which would be dangerous; rather, the act mixing blood into Celox activates it, turning it into an artificial, gel-like clot. This kind of clot is incredibly effective at staunching blood flow, with 100% of swine test subjects surviving a cut femoral artery.

If you're interested in there's a  research abstract .