Onchopristis numidus, or the ancient sawfish, was a large, odd-looking fish with teeth all along their rostrum (or snout), resembling a chainsaw. To hunt, the sawfish would swipe its snout at prey, impaling fish along the bottom of the ocean floor. Though they resemble modern sawfish, they are not closely related. This is an example of convergent evolution, in which multiple animals adapt similar solutions to survive in their environment.
Onchopristis numidus, or the ancient sawfish, was a large, odd-looking fish with teeth all along their rostrum (or snout), resembling a chainsaw. To hunt, the sawfish would swipe its snout at prey, impaling fish along the bottom of the ocean floor. Though they resemble modern sawfish, they are not closely related. This is an example of convergent evolution, in which multiple animals adapt similar solutions to survive in their environment.