Why might Bruder's legs not have been satisfying for the shark?

If he ate Bruder's legs, it would not have kept him satisfied for very long. Either way, he was hungry and still on the hunt. The shark craved large mammals rich with blubber, but the North Atlantic region did not offer him many such choices. Man is not a desirable part of a shark's diet. In most cases, white sharks dislike the taste of humans and spit them out.