[Image removed by request of the artist]
Anomalocaris probably hunted trilobites and other hard-shelled arthropods because of those crunching jaws and huge claws which were probably perfect for crunching shells.
Anomalocaris was the top predator in the Cambrian Period. It was six feet long. In Walcott's perspective, Anomalocaris was not the top predator, Sidneya was. Back then they thought the claws of Anomalocaris were shrimp encased in bivalve shells, and the swimmers were jellyfish, and the mouth was a jellyfish called Peytoia. Now we know it was one creature, Anomalocaris.