[ken5050]

Article makes no sense. As prey species evolve and grow larger, predators will also evolve9 grow larger) to be able to hunt them, and/or evolve new strategies, such as hunting in packs.

The ichtyosaurs are NOT a prey species..they are predators. In nature, predators will only prey on each other when there is competition for a food source and/or territory. They avoid attacking each other because even the winner can suffer a disabling injury..and a disable predator is soon to be a DEAD predator..

[null and void]

Tell that to the giant squid and sperm whales.