Even so, some might wonder, what's the problem, aside from the fact that the whole process sounds like the plot for a sci-fi film?
"The only problem is that the companies need a large supply of the blood of live crabs," a 2014 article in The Atlantic noted. "Horseshoe crabs live on the seafloor, near the shore. When they want to mate, they swim into very shallow water, and horseshoe crab collectors wade along, snatching the crabs out of their habitat."
The article also notes that there have been observations of female horseshoe crabs becoming less likely to produce offspring after being bled.
And that could be causing populations to dwindle. According to the IUCN Red List, the horseshoe crab is already classified as a near-threatened species. And there's been an observed decline in the population of birds that feast on the eggs of the horseshoe crabs.