Dunkleosteus was a massive armored fish that ruled the Devonian seas over 358 million years ago. With powerful, self-sharpening jaws and an immense bite force, it was one of the most fearsome ...

4 min read When the Devonian period dawned about 416 million ... as it spawned a remarkable variety of fish. The most formidable of them were the armored placoderms, a group that first appeared ...

Placoderms are a class of prehistoric armoured fish that first appeared ... Placoderms were the most abundant and diverse group of fish during the Devonian period, which was 419 to 359 million ...

At that time, known as the Devonian period, the world was changing dramatically: complex plant ecosystems formed on land, the first woody plants appeared, and the water's edge was becoming a new ...