Flatfish offer an evolutionary puzzle: How did one eye gradually migrate to the other side? By Carl Zimmer A flounder looks like a hallucination of a fish. Its body is flat as a pancake ...

A Pacific leopard flounder travels the seafloor near ... As they develop “the eye begins to migrate, moving over the top of the head, eventually settling on one side or the other,” Burgess ...

A flounder begins life looking like any other fish – swimming upright and with an eye on each side of their head. At about 5 weeks old, one eye actually begins to migrate across its head until ...

They are the somewhat oddball fish that lie on the ocean floor with two eyes that peek ... type of seasonal migration. The commonality is that they are both species of flounder.

Eyes in the animal kingdom are as diverse as the creatures themselves, each type evolved for a specific purpose in a unique habitat. From eyes that can split vision across two worlds to those that ...