Charlie the Coelocanth says, "Deep, cold water is deep, cold water."
Yes but in the 400 million years the coelacanth has been around you expect us to believe that there was no environmental change? You cannot be serious. And what happened to mutations? Certainly these species were not perfect. There could have been numberous improvements to them that would have been helpful - a smarter brain, better fins, changes to make it reproduce more or better. Clearly there are many possible changes which mutations could have achieved (especially in such a long, long time) to make it more fit? Heck, you know, as a matter of fact, that is how punk-eek works, a species improves itself in a secluded habitat and through super-evo transformation takes over the world! Clearly these species had enough time to do so. Or are you perhaps trying to tell us poor fools uninitiated in the church of evolution that the demi-god Darwin told this species "you shall not mutate any more, you are fit enough already and you have not been chosen to be the ones to take over the world"?
Do you know what local maximum on a fitness landscape is?
Are you claiming the earth is at least 400,000,000 years old?