Orthacanthus

Orthacanthus prehistoric shark, white background

Orthacanthus prehistoric shark, side profile

Headshot of an Orthacanthus shark

Poster of prehistoric animals of the Devonian period

Xenacanthus, a Devonian freshwater shark

Orthacanthus was a freshwater shark that thrived in the ?

A group of Xenacanthus prehistoric sharks

Xenacanthus, a prehistoric shark from the Devonian and ?