Here's the refutation again in case you wish to engage your mind: local maximum on a fitness landscape. You said you didn't know what it was. Did you find out? Regards.
Typical gobledygook. Trying to sound profound when all you are doing is being unintelligible.
You have not answered my question as to why these species have not been mutating for 400 million years. There are always improvements possible regardless of how limiting the environment may be. In fact, if punk-eek is to be true for example, the species in the limited environment must overcome the limiting environment in order to spread itself past its boundaries. I also see no particular limitation to the coelacanth's environment. The oceans are huge and there is no reason why the species could not have improved itself. Unless of course the demi-god Darwin ordered them to stop mutating, to stop adapting, to stop evolving.