ocr: Tree( ofFishes Dl This long case, which runs the length of the wall, arranges fishes according to such shared characteristics. The rays, for example, all have flattened bodies, enlarged pectoral fins, eyes on top of their heads, and gill openings on the lower sides of their heads. These features are believed to have been inherited from a common ancestor. They therefore indicate that rays are more closely related to each other than to any other living things. While flounders also have flat bodies and eyes on top of their heads, they do not have enlarged pectoral fins or gill openings on the 2 4
(.png)
