Currently, perhaps, but many advances are being made. https://www.scientificamerican.com/article/the-future-of-fish-farming-may-be-indoors/ https://www.scienti

Currently, perhaps, but many advances are being made. https://www.scientificamerican.com/article/the-future-of-fish-farming-may-be-indoors/ https://www.scientificamerican.com/article/the-future-of-fis...