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Super-useful creature.

"Horseshoe crab blood: The micracle vaccine ingredient that's saved millions of lives."

https://www.nhm.ac.uk/discover/horseshoe-crab-blood-miracle-...

Damn, this was interesting and depressing the same time.

Not clicking on that. I recall seeing a picture of rows of hundreds of crabs strapped to harnesses, bent in half, with needles in their backs draining their blue blood. Still can't get it out of my head.

had a friend in college who did that as his summer job. They take great care to make prevent them from dying but then they get sold to fishermen to be used as chum... go figure.

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