Ancient Mega-Fish Was a Giant Swimming Mouth With a Tiny Body : ScienceAlert

There’s a problem for researchers trying to identify the size of ancient armored fish from the late Devonian period (approximately 382-358 million years ago): only the armored parts around their heads have been preserved in fossils.

In other words, we’ve been trying to judge the size of species like those in the Dunkleosteus genus of large underwater creatures based on the size of their mouth and jaws. The rest of the body, made up of cartilage, hasn’t survived down the millennia.

A new analysis of data from previous studies suggests that the dimensions of these prehistoric fish cannot be…