It’s being call Frankensquid, giant lobster, man-sized swimming centipede, or just plain weird.  The name is actually Aegirocassis benmoulae and it’s an anomalocaridid from the Early Ordovician Fezouata Biota of Morocco.  It measured about 2 meters (7 feet) in length and was a filter feeder that used a technique similar to modern day baleen whales.  Scientists spent about 500 hours preparing it’s fossil.  It is one of the biggest arthropods that ever lived, and is far larger than the largest modern arthropod.  Originally thought to have gone extinct in the Cambrian, anomalocaridids have been found in the Ordovician and on up into the Devonian.

The original paper is in the journal Nature.