But fewer people are aware of their very distant relatives — a type of bony fish called the rainbow shark. Unlike their larger counterparts, rainbow sharks are actually small freshwater fish ...

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 ...

They are considered one of the longest bony fish, with their ribbon-like bodies helping them float seamlessly through the water column. Below is an overview of their key characteristics: ...

Due to this long period of evolutionary isolation, Polypterus still has many primitive characteristics that provide important information on the early development of bony fish. Read the full story ...