The pelorus, Piscisaurus sicamalus, is a small, polycotylid-like pliosaur from the open seas of the Atlantic, Indian and Pacific Ocean. The pelorus is a small pliosaur and, like its relatives, it feeds on ammonites. This is the only type, however, that has the ability to attack and kill the largest ammonite of the oceans, the kraken. It hunts in the warm placid waters of the doldrums, where its prey is most abundant.