I truly think the only way around this would be to purchase captive bred livestock.what about getting fish from a source like https://www.livestockusa.org/? That seems to cut out a lot of steps in the supply chain.
sure they're eaten, but how many fish are wasted too? catch that is the wrong type, fish that spoil due to refrigeration malfunctions, food waste in the restaurant industry.At least most of the food fish harvested are eaten, unlike the countless ornamental fishes that end up in the trash or down the toilet.