This is so fucked up... I am feeling sick.
It's not eating humans, that is really disgusting, but eating self-aware creatures. Treating someone merely as a source of food, breaking down them into their components and then using what is salvaged from their bodies as a sustainment, is just sick.
Sure, we're talking here about the fish. But that fish here has a personality. Just imagine if these fish were previously humans and now they are just a bunch of tasty meat on a plate.
*explodes*