Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. With copper-blue blood prized by modern medicine and a body ...

Under the light of the summer full moon, College of Southern Maryland students have been wading into the shallows of local ...

An enzyme in the blue blood has been key to testing vaccines since the 1980s, raising concerns for the crabs’ population. But regulatory approval and new data are signaling the tide may be turning ...

Horseshoe crabs are nicknamed "living fossils" because the species has survived virtually unchanged for millions of years. (Courtesy of Kate Castellano) Beneath their helmet-like shells, horseshoe ...

Horseshoe crab populations in Rhode Island have not rebounded in 25 years despite restoration efforts. The crabs are harvested as bait for fishermen, and their blood is used to test for bacterial ...

Now that New York State has approved a phased-in ban on the harvest of horseshoe crabs for bait and medical uses, fishermen who harvest or use the species to trap whelk and eels say it’s imperative ...

Deborah Cramer is an adviser to the Massachusetts Horseshoe Crab Collaborative and author of “The Narrow Edge: A Tiny Bird, An Ancient Crab, and an Epic Journey.” Have you ever been vaccinated against ...