Yes it is Podzy,and just look at the Asian Arowana industry.It seems as if those fish don't reproduce outside of where they are farmed,unless by some fluke or small miracle.
I Think these "Miracles" are the result of certain fish somehow being immune to whatever they are doing. Every now and again there are fish reproducing at home.
Here's a short article about a technique where the sexually mature female is injected with something that will not allow her offspring to become sexually mature.
It is being used in Fish farms to prevent farmed fish from breeding with wilds , if they get loose.
http://sciencenordic.com/creating-sterile-farmed-fish