The tri-spine horseshoe crab is classed as endangered. It's locally extinct in Taiwan, and should shortly disappear from Hong Kong. The opposite two Asian horseshoe crab species usually are not thriving both. The animals — not really true crabs but rather far more closely connected with land-dwelling invertebrates for example https://where-to-buy-horseshoe-cr30752.tblogz.com/the-ultimate-guide-to-how-much-blood-is-in-one-horseshoe-crab-44320934