Life in prehistoric oceans could be pretty terrifying. Take for instance the predatory jumbo shrimp that roamed the oceans 480 million years ago.
But a newly discovered species of the giant arthropods is more of a gentle giant. Aegirocassis benmoulae, identified from fossils found in Morocco, was a 6-foot-long filter feeder that supported its massive heft by skimming the oceans for plankton. That makes it one of the biggest arthropods ever found, and also the first-ever giant filter-feede