As a concrete example. My father in law is a fisherman, of various shellfish. Puts a premium on being sustainable and a lot of his business is farm raised shel

As a concrete example. My father in law is a fisherman, of various shellfish. Puts a premium on being sustainable and a lot of his business is farm raised shellfish. Rays eat the shellfish. They can decimate beds of shellfish. Sharks eat the rays. I've joked with him about raising sharks as a farm raised fish. He laughs but gets kinda terrified of the idea because he actually thinks it through a bit half seriously and is nervous about sharks. I'm surprised there isn't aquaculture programs for sharks though if there's such a demand. Lots of sharks are small. My impression based on reading a bunch of links is that a bit of genetic engineering and bigger demand would improve yields and efficiency of plant and microbial squalene. It seems like in this type of situation the differential is usually due to historical convenience. Biomedical research is full of examples of this sort of thing. It's not exactly a beacon historically for animal welfare. Horseshoe crabs are a similar example that come to mind as a para llel.