4 min read When the Devonian period dawned ... The cartilaginous fish, so-called because cartilage formed their skeletons, later gave rise to sharks and rays. They had small, rough scales, fixed ...

He thinks that the temperatures have been too warm for the rays' return. Octavio hopes to one day see these majestic fish near the California coast again. And next time, he says that he plans to ...

We have arrived in the Devonian period ... provide additional evidence of the evolutionary link between the ray fins of bony fish and the fingers of land vertebrates. As scientists now have ...