Thank you for the links.....though I am not sure what you thought I would learn from them that I don't already know.
You asked for links and references, and I gave them to you. As for what I thought you would learn from those links? Well, you said sharks had bones, for one.
"Where did cartilaginous fish come from, and when?
According to fossil evidence (primarily based on shark teeth, which get preserved much more readily than any other part of a shark), the earliest sharksevolved about 400 million years ago. 'Modern' sharks arrived starting around 35 million years ago, and megalodon, white sharks and hammerheads came about 23 million years ago. Read More About Shark Evolution"
Can you tell me how something that takes millions of years to "evolve"....."arrives"?
The time that something "arrives" in the fossil record is the first known appearance and evidence of it. Unless you would have the entire world use the English language only as you see fit, I don't see why you keep bringing up these games of semantics. All of these wording arguments have already been put to rest. Read some books from higher sources and you'll see the wording is quite common and has not the connotation which you assume.
Not sure what this is proving.....many creatures have a pelvis......
Land creatures have a weight-bearing pelvis which require bones and joint structures suitable for handling movement and loads. Fish "kinds" do not, as you can see with the shark pelvis. The occurrence of vestigial, weight-bearing, pelvis joints in oceanic mammals is just
one part of the evidence which refers back to their land dwelling heritage. You should read more about vestigial organs, and not focus solely on trying to pick apart each minute aspect of a greater body of work. The whale is only one example. There are hundreds of others that we know of.
As a side note, you mentioned sharks as part of the fish "kind". Using creationists logic then, and having already admitted that adaptation occurs, you'll have no problem agreeing that this little fish, and this huge shark, are only separated by micro-evolutional changes since, as you say, they are of the same "kind", right?
Science can use its imagination as to how these things came to be...and so can we.
Just because you don't like the implications of something doesn't make it imaginary.
Your entire argument here is based on the idea that if you can't directly observe something, then it's clearly only speculation and guess-work. This is an argument that is made ad nauseum by proponents of this movement you've entrenched yourself in as a way to discredit the majority of knowledge, if you really want to break it down. The same concept that lets you know that a trillion dollars exists, when you probably have only ever seen a few thousand in your lifetime, is prevalent in all of these "imaginary" sciences that you're trying to debunk simply to maintain your faith in something that shouldn't really require evidence to begin with...
There are whole host of sciences and studies that go into understanding vestigial organs. Since we are talking about the pelvic bones of whales, I'll just stick with that example.
Zoology, Mophology, & Osteology alone would be sufficient fields to read up on if you want to learn about the skeletal structure of animals, the biological reasons for requiring those bone structures, and the tie-in to an animal's morphological development within a certain environment. Each of those three disciplines accepts and understands the existence of vestigial structures...
Zoology - Wikipedia, the free encyclopedia
Morphology (biology) - Wikipedia, the free encyclopedia
Osteology - Wikipedia, the free encyclopedia
On top of that, Myology is the study of the muscular systems of animals. It's the study of how bone structures and muscles combine in animals to allow for motion, and ranges of motion. That same study also gives insight into shape and muscle density, which in turn would from how an animal looks(looked) It's not only art and make-believe, as you suggested earlier, when paleoanthropologists and paleontologists are recreating life-size specimens of the fossils that they uncover. They don't take random guesses as to how many vertebra are in an animal's spine when certain pieces of fossilized remains are missing. They use compounded knowledge and data make very educated models of what biology dictates that the animal would have required in order to function and survive.
Myology - Wikipedia, the free encyclopedia
If you find 3 fossilized examples of the same organism, and each one has a different set of bones with it, you only need 1/3 of the spine of each organism. If one has the pelvis and lumbar, one has some midsection, and one has vertebrae from the skull down, then you've essentially an entire specimen.
The following link, using Google Scholar, contains 1,780 references combining Osteology and Vestigial structures. Read some of them.
osteology and vestigial organs - Google Scholar
You can perform the same search using the sciences listed above, combined with the word vestigial, and you'll start to get some actual understanding of what you're trying to say is simply make-believe.
This one is rather on point for the topic of conversation.
https://www.jstage.jst.go.jp/article/jvms/66/7/66_7_761/_pdf