Today I realized that in Shark Tale, the sushi restaurant was empty because that was

Today I realized that in Shark Tale, the sushi restaurant was empty because that was cannibalism.
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(TITLE FROM REDDIT r/funny)

It's only cannibalism if fish of the same species eat each other. Fish eat other fish all the time.

He should of open it in the shark neighborhood.

No, the restaurant was empty because his customers were the ingredients.