In Depth Doryaspis was a jawless fish that swam in the oceans of the early Devonian, and one that had an unusual body shape. Like others, it had a rounded box-like body with a long flexible tail, but it also had a long, thin pointed snout projecting from the front, as well as two more … Read more
In Depth Although in fish terms Thelodus were very primitive, this genus shows a development towards stronger open water swimming. Thelodus possessed a better developed tail, a dorsal fin (on the back), and anal fin (underside, near the tail) as well as rudimentary pectoral fins in the shape of flaps that could be angled to … Read more