[Virginia-American]

Is that so?! Are you claiming that Sharks and Tuna have no identical genetic routines in their DNA?

Since shark and tuna diverged before either was as streamlined as they now are, standard biology predicts that the mutations responsible for the convergent evolution are different.

Some of the genes for things like cellular metabolism, histones, etc, (ie, things that they inherited from a common ancestor) may be quite similar.

[Southack]

"Since shark and tuna diverged before either was as streamlined as they now are, standard biology predicts that the mutations responsible for the convergent evolution are different."

Aye. That's the prediction. Now, what do their respective genomes say in reality?!