Out of the four extant horseshoe crab species left on the planet today, only the tri-spine horseshoe crab found along the coast of India, Southeast Asia, China, and Japan, is classified as endangered ...

In the Philippines, the tri-spine horseshoe crab has made a home and other species are returning too. A tri-spine horseshoe crab kicks up sediment along the muddy bottom of the Pangatalan Island ...

Jesse Lerer, a volunteer, is recording horseshoe crab data on Plumb Beach, Brooklyn. Volunteers record number, sex and other details. Camilla Cerea Horseshoe Crabs in a quadrant. During the count two ...

A new study looking at horseshoe crabs in the Long Island Sound confirms the ancient creatures face potential extinction. The threat stems from climate change, loss of habitat, and overharvesting.

Humans rely on the animal’s blood for lab testing, but the full repercussions of the industry are still not understood. An Atlantic horseshoe crab attempts to flip over on Pickering beach, a national ...

Horseshoe crabs used to be everywhere. Millions of years before dinosaurs roamed the planet, each spring, the hard-shelled creatures gathered to mate in massive mounds along the beaches of the ...

Every year in May when high tide coincides with the full moon, horseshoe crabs convene on the beaches of the mid-Atlantic coast to lay millions of eggs. At the same time, migratory shorebirds on their ...

Mass Audubon's science coordinator Mark Faherty examines a horseshoe crab in Pleasant Bay, where he has conducted research on them for years. John Tlumacki/The Boston Globe via Getty Images If you ...

Pharmeceutical companies could soon have easier access to synthetic alternatives to horseshoe crab blood, a key ingredient used to test vaccines and medical devices for contamination. The U.S.