I appreciate that information. However, flounders themselves are not bilaterally symmetrical. I have caught many dozens of them and it’s pretty easy to tell that they are not.
Flounders are born symmetrical; eye migration happens as they transition to the juvenile stage of growth.
Isn’t it referring to during development? Like as they’re forming, they are bilateral? I haven’t taken developmental biology in many years, so I’m maybe wrong.
They are born (or hatch too lazy to look up) and their eyes move later once they get larger.
They’re only bilateral when they’re very young. And even then, everyone is just focusing on the eyes. The body of the fish is also not exactly bilateral. Just fillet a flounder of any age (or watch a video on it) and you’ll see.
