One of the nicest tasting fish I ever consumed was a steak cut from what we called a river shark. They only grow to somewhere between 2 and 3 feet in length, and its flesh was extremely white, and very tasty - not overpowering at all.
BTW, whale sharks only eat krill, and do not have teeth. They are very gentle creatures, and grow to a huge size. We have often watched documentaries with people happily swimming with them - not for me, though.
