Also known as the rock sturgeon, the lake sturgeon is one of 27 species of sturgeon, a family of bony fish that found around the world that first appears in the fossil record more than 200 million ...

In 1972 when it was first discovered, the external features implied that it had a skeletal structure similar to an early bony fish (or osteichthyan). Later when the researchers examined the fossil ...

These joints are present in land vertebrates and bony fish, suggesting this ... but apparently absent in jawless fish, indicating that these joints first evolved in the ancestors of jawed vertebrates.

The bony fish included lobefins ... leaving it only to escape the attentions of predatory fish. The first ammonoids also arose during the Devonian. Related to octopuses and squid, these marine ...

The first sharks on Earth ... The difference between a shark and other fish: Unlike bony fish, sharks, rays, skates, and chimaeras are cartilaginous fish, meaning their skeletons are made of ...