[trek]

"You have to remember that the process of evolution is different for each species,"

I will check out your link, but this argument is bogus on the face of it. The results might vary from species to species, but the principle of uniformity would demand that the process be the same for all species. And, given the time frame involved with the Celocanth, it seems that the Theory of Evolution would have to explain why some species are not seen to evolve.

[beaver fever]

There actually are material differences between the fossil Celocanth and it's modern descendents.

The fossil Celocanth has distinct differences in the size and shape of it's leg bones and their are actually two different species of Celocanth. One lives off the coast of Africa and another off the Coast of India.

They are isolated from one another and have evolved separately.

Also the seeming lack of distinction between fossil and living Celocanths is due to their environment which is nutrient poor and free of predators. Celocanths also have a very low metabolic rate in order to conserve energy.

It's not surprising then that Celocanth evolution has been so subtle and slow.

[Ichneumon]

And, given the time frame involved with the Celocanth, it seems that the Theory of Evolution would have to explain why some species are not seen to evolve.

And it does, although it's incorrect to say that some species "don't" evolve. Even the ones that stay looking relatively the same over very long periods of time have still evolved in significant details.

For example, the coelacanth has not survived "unchanged". Modern coelacanths are significantly changed from the 340-million-year-old ancestral version, to the point where they are assigned not only to different species, but even to a different genus altogether.

They're still recognizably in the same family, though, which is considerably less evolutionary change than, say, a modern pelican compared to its ancestral therapsid dinosaur over the same timespan, but the point remains that the coelacanth is not actually "unchanged", and its evolution did not somehow "stop" during the last 300+ million years.

And varying amounts of evolutionary change in different lineages is no challenge to "darwinism", as some like to claim, since Darwin himself predicted this effect in his "Origin of Species" book back in 1859.