The American Horseshoe Crab is about as close as you can get to a creature that shared the Earth with dinosaurs, but the Center for Biological Diversity said the marine animals are in trouble.

The lawsuit claims that if the United States protects horseshoe crabs, more biomedical companies would make a faster switch ...

The humble horseshoe crab, an ancient species crawling seafloors since before the dawn of the dinosaurs, was durable enough to survive the mass extinctions of eons past. But now, hundreds of millions ...

The horseshoe crab (Limulus polyphemus) is often described as a "living fossil," a species that has endured for over 450 million years. It outlasted the mass extinctions and dramatic shifts in Earth's ...

Environmentalists are suing the federal government over what they say is a failure to protect the horseshoe crab, a ...

Environmentalists petitioned in 2024 for the Fish and Wildlife Service to protect the American horseshoe crab.

A conservation group sued President Donald Trump's administration on Monday over its failure to act on protecting American horseshoe crabs, which are increasingly threatened by the harvesting of their ...

While conservation efforts have bolstered the populations of many species considered to be threatened in 2025, many animal and plant species continue to dwindle in number, with some even going extinct ...