When/if you get your hands on some fresh shark, here's one of the best recipes I've ever tasted...and it's simple.
Mix up a small bowl of mayonnaise, seasoned with onion pepper (or lemon pepper) and garlic salt. Mix well.
Take some heavy-duty foil and turn the edges up to form a shallow pan. Place the foil on a barbecue, throw on a bunch of butter and sauté some sliced sweet onions seasoned with pepper until they are about half-done. Then add the shark steaks, liberally coated with the mayonnaise mixture and cook until the shark is done.
Put the shark meat on a plate, cover with the onions and enjoy!