The Bluefin Tuna is one of the fastest long distance swimmers which translates as high efficiency. I haven't perfected the art of overlay, but here's my rough job below, I've included both pic's, so maybe someone can do a better presentation, looks like the Bluefin needs to be rotated slightly to the right.
Even with the rough job it looks pretty good to me, they also lay down all fins at speed into specially designed grooves.
