[CLASSIFIED]

I'm not 100% sure we're talking about the same thing.

Our DNA knows what it is doing; shark DNA included.

I'm partial to blondes, but if there aren't any at the party, then I'll settle for the willing.

It is the same thing with sharks. The shark decides to mate with a different type of shark to insure its survival. Not because it randomly mutated a gene that compelled it to, but because its dna told it to because of the change in the enviroment.

To your point I first quoted; this is big news for evolution the way it is commonly understood, or more appropriately; the way it is commonly proffessed.