This is a summary of something I heard directly from an aquarium employee regarding the question of, “why don’t the sharks eat their tank mates?”
The short answer is: sometimes they do. This doesn’t happen very often though, for a couple of reasons. First, all the fish are kept very well fed, and well fed fish are much less likely to expend the effort to hunt down a tank mate. And second, we only pair the sharks with fish that are not their natural prey, making them less of a target.
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