The American horseshoe crab, a marine creature that has survived mass extinctions, climate shifts, and environmental changes for over two hundred million years, is under increasing pressure. The species, found along the Atlantic coastline of North America, plays a crucial role in contemporary science and medicine, as its blue blood contains a substance that can detect bacterial toxins and is essential for testing the safety of vaccines and medical equipment. However, habitat destruction and increased population numbers have led to significant population declines, leading conservationists to label them as a vulnerable species. Conservation efforts are now focusing on balancing medical needs with sustainable harvesting practices. The decline of these species is also a broader environmental concern with implications for other species.