The Largest Arthropod in the World: The Japanese spider crab has the largest leg span of any arthropod, reaching up to 3.8 meters (12 ft) and weighing up to 41 pounds (19 kg). In its natural habitat, the Japanese spider crab feeds on shellfish and animal carcasses and may live for up to 100 years.
New Sea Spider Fossils Found. August 16, 2007-A rare treasure trove of ancient sea spiders found in France fills a 400-million-year gap in the mysterious creatures' spotty fossil record, scientists say. The well-preserved marine animals, called pycnogonids, were unearthed in 160-million-year-old fossil beds at La Voulte. A team of French scientists describes 70 specimensincluding the one seen above—from three distinct species found in the region's Lagerstätte, a sedimentary rock formation.