Big injury from a croc fight healing up quite well. Crocodiles have powerful immune systems because their blood contains high levels of antimicrobial peptides (AMPs) AMPs are small proteins or peptides that are naturally found in cells and have antimicrobial properties. They are essential to the innate defense systems of living organisms, including humans, animals, insects, and plants. These positively charged amino acid sequences target cell membranes, interacting with negatively charged bacter