I think you got that comparison backwards. A coelacanth is a lobe-finned fish which is the group from which tetrapods, and thus humans, evolved. A salmon is a

I think you got that comparison backwards. A coelacanth is a lobe-finned fish which is the group from which tetrapods, and thus humans, evolved. A salmon is a ray-finned fish which is a very different group. These groups diverged sometime around 300MYA.