I was not thinking about fishing for food, I was more thinking about capturing 4 or 5 sharks knowing most would die on their way to the lab. We all did that sort of thing without a second thought.

And I think our growing awareness of animal cognition is going to lead us to figuring out how to keep the one we need alive. Sharks apparently have a richer life than we've known, though they don't seem to have eaten from the tree of knowledge of good and evil. No egos, or not much of one.

For such voracious eaters as sharks to refuse to eat to the point of death seems to say something, though it may only be that they regard the prepared, McDonalds model, food as beneath them.