> Growth hormones
Would be antieconomic and is useless. But If you have recent data about this, please show the data. Take in mind that human growth hormones don't work in fishes if I remember correctly.
> And they use a lot of antibiotics.
Antibiotics like, for example?
Terrestrial farms are totally different than sea farms. I don't think that Norwegians use more antibiotics than Thailand Panga farmers. Crustacicides, I'm sure that they use it, but "lots of" antibiotics claim... I'm sceptical about this.
Comparing traditional aquaculture with Marine aquaculture is like saying that an ox chart and an electric vehicle are the same thing.