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From an ecological point of view this is good news.

Unlike almost all food fish (which need to eat meat), tilapia eat plants.

Almost all animals - except fish - eaten by humans eat plants, and now fish will join the list.

By eating plants they are eating much lower on the food chain, this significantly reduces the impact and resources needed to grow the animal.

Here's a crazy idea

instead of eating fish, eat soy-and-corn mixture

Tilapia also eat algae. Are you going to suggest we eat that too?

we could call it nori or agar

I think most meaty fish food comes from by catch. naturally that can't replace fishing, but it's not like they compete with is for cows.