This animal's body was fragile and usually disintegrated before it could be fossilized.[41] But the complete animal had tough grasping appendages (Anomalocaris), a tough, ring-like mouth with teeth on the inner edge (Peytoia) and a long, segmented body (Laggania) with flaps on the sides that enabled it to swim with a Mexican wave motion, and perhaps to turn quickly by putting the flaps on one side into reverse.[41][42] This monster was over 2 feet (0.61 m) long when other animals were only a few inches at most.[42][43] Nedin suggested in 1999 that the animal was capable of taking heavily armored trilobites apart, possibly by grabbing one end of their prey in their jaws while using their appendages to quickly rock the other end of the animal back and forth, causing the prey's exoskeleton to rupture and allowing the predator to access its innards.[44] In 2009 Hagadorn found that anomalocarid mouthparts showed little wear, which suggests they did not come into regular contact with mineralised trilobite shells.