Wild Animals

Wild Horseshoe Crab Biomedical Welfare

Horseshoe crabs are harvested for their blood in biomedical production, raising welfare concerns despite their unusual physiology.

Key Facts

Horseshoe crab blood contains limulus amebocyte lysate used to test medical products for contamination
Up to 30% mortality is reported in bled crabs returning to the ocean
Synthetic alternatives to horseshoe crab LAL have been approved but adoption is slow
Horseshoe crab populations support migrating shorebirds that feed on their eggs

Welfare Considerations

The welfare of horseshoe crabs during bleeding is uncertain due to limited understanding of their pain experience, but mortality rates of up to 30% represent a clear welfare and conservation problem. Synthetic alternatives exist and their adoption would eliminate this uncertainty.

What You Can Do

Support healthcare organizations adopting synthetic LAL alternatives
Advocate for regulatory acceptance of synthetic alternatives to horseshoe crab LAL
Donate to horseshoe crab population monitoring and conservation programs
Engage with pharmaceutical industry associations about transition timelines for synthetic alternatives