No not really. A shark (or any fish) would not be able to turn on a dime the way it does without a dorsal at midfish. The hunter would suffer, so nature evolved the hunter.

The canabalizer serves a similar purpose, although just the vertical is good enough for that purpose alone. It's a pivot which also helps raise the center of pressure on the vertical stab. Helps with all the mixing and force coupling

When you see only a horizontal with no vertical component, the horizontal area adds to the wing.... A simple transferring of the area they have removed from the main wing. That way the stab percentage and TVC can be maintained