Is it more costly to raise cattle for beef or raise fish in aquacultures? I can't find any sources comparing the cost of the two methods.
Specifically, I want to know if its more economically efficient to raise fish as a food source rather than beef - not counting government subsidies.
My intuition says raising fish is cheaper since you can raise thousands of them at a time, but I don't know what costs are associated with maintaining an aquaculture environment (water temperature, chemical/pH balance, etc). I know it costs a lot of money to put a pound of beef on the table (without subsidies helping lower that cost), but i can't find a similar cost for aquacultured fish.
Also i'm not sure if this is the best stackexchange community for this question but i couldn't find a better one that makes sense for this question; if there is a better one please let me know!
Cost of production is somewhat difficult to pin down, since much of that information is private.  However, consumer costs are widely available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2954450/
I have managed to find a comparison of beef, pork, dairy, poultry, and eggs to plants in terms of protein, and broadly beef is the most inefficient of those (See Figure 3): https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5899434/
This suggests (but does not prove) beef is probably the more inefficient of the two.