How useful are cladograms and ‘transitional’ creatures as evidence for evolution?

Kevan M. from the United States writes:

I am looking for information on the mudskipper, which I am told is a member of the suborder Oxudercinae, from the creation perspective. It has often been used to promote Evolution. Could you give me an answer about it, showing its design and how it makes problems for the worldview of Evolutionism? If there are articles already on this, could you give me the links to them? Thank you!

Kevan M.
Psalm 119:160

There is still time to win a battle before the sun goes down.

CMI’s Shaun Doyle writes:

Dear Mr Myers/Kevin,

Thank you for your email. As it happens, the very latest issue of Creation magazine has an article about mudskippers—you can subscribe via our gateway page to our online archive of Creation articles. (In about one year from now, the current issue’s mudskipper article will be accessible online for free. We maintain a one-year embargo on the majority of Creation articles in fairness to our subscribers.)

Why do evolutionists use mudskippers as examples of evolution? Evolutionists use them because they are quite literally ‘fish out of water’. Mudskippers can live in water or in moist land environments, such as mangroves. They have a unique and specialized physiology that allows them to do this. However, nobody has observed anything evolve into or from mudskippers; all we’ve observed are mudskippers begetting mudskippers.

It looks nice and neat to arrange mudskippers in an evolutionary series that may go something like: perch—mudskipper—salamander, based on various traits each creature has. Because the mudskipper has some features in common with the perch and the salamander it looks like a transitional form. But there are a number of problems with such a proposal….

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