I guess I'm not totally aware of who the "they" are in "they usually do some research first" because I feel like a significant chunk of fish purchases come from parents of little children who are already sleep deprived and go to the nearest pet store or (God forbid,) Walmart or any other shop where they know there are fish.
If you're correct that "they usually" actually do research beforehand, there would probably be a market big enough to sustain a small online business.
If you're correct that "they usually" actually do research beforehand, there would probably be a market big enough to sustain a small online business.