system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Are we fishing at too high of a rate? Are we going to run out of fish?

I remembered reading something along these lines earlier this month, but can't find the source. Do we not farm fish?
gpt
We are not going to fish every fish out of the sea. But if we overfish, stocks will fall and either all fishing becomes uneconomic or fish becomes very expensive.  
Yes we do farm some fish, but only a very small percentage of what we eat, and only certain types of fish are suitable for farming. Additionally much of the food fed to captive fish is made from fish-meal. So if the fish in the sea become expensive so will the fish-meal.