At the time, it never occurred to me. Now, I'm having second thoughts.

Still, the sharks were harvested for scientific purposes, their huge livers were suspected sources of anti-cancer compounds (sharks never get cancer). The others taught us about shark behavior and biology. While I was at Cape Haze, the very first instance of shark mating was observed and photographed. Two tigers were copulating in one of the pens, it caused quite a sensation among the staff. There was no economic imperative to increase the catch.

It could be argued the scientists made their living off those deaths, but they did not constantly market the product in an attempt to increase sales. Once they had the fish they needed for their research, they harvested no more.

Its a bit different from cutting off the fins to make soup for rich restaurant patrons and throwing the rest of the helpless animal back into the sea to drown.