Blue Blood from Horseshoe Crabs Is Needed for Medicine, but a Declining Bird Relies on Crabs to Eat

July 31, 2023

(Associated Press) – Drug and medical device makers are dependent on the valuable blue blood of the crabs — helmet-shaped invertebrates that have scuttled in the ocean and tidal pools for more than 400 million years — to test for potentially dangerous impurities. The animals are drained of some of their blood and returned to the environment, but many die from the bleeding.

Recent revisions to guidelines for handling the animals should keep more alive through the process, regulators said. The animals — not really true crabs but rather more closely related to land-dwelling invertebrates such as spiders and scorpions — are declining in some of their East Coast range. (Read More)