EurekAlert: Climate change is about to cause a major upheaval in the shallow marine waters of Antarctica. Predatory crabs are poised to return to warming Antarctic waters and disrupt the primeval marine communities. “Nowhere else than in these ecosystems do giant sea spiders and marine pillbugs share the ocean bottom with fish that have antifreeze proteins in their blood,” says Rich Aronson, professor of biological sciences at Florida Institute of Technology in Melbourne, Fla. “The shell-cracking …