I'm glad someone else noticed it was a whale shark. And it's a baby one at that

http://www.snopes.com/photos/animals/giantcatfish.asp (warning, includes pics of fish guts)

Even though whale sharks grow to something like 60 feet and have huge mouths, their throat is actually very narrow. I saw a special on Tv where the Atlanta(?) aquarium had a few in their display and they had to feed them with a little bitty bucket at the end of a pole.