I am aware of the permit needed. Doesn't really make sense to me with a fish that will die off each winter since there's no chance of them taking over a BOW. However if my pond could be used to help support the Iowa DNR and there decision towards Tilapia in our ponds i would be all for that. Tilapia farming is becoming a very ligitamate business in the state it sounds like. I do believe (not certain) it is legal in an aquarium? I know tilapia use in aquaculture is very popular which is what gave me the idea to grow them out in my basement. I already grow tomatoes and peppers hydroponically over the winter as a hobby so it would be very easy for me to incorporate them into that. Yes $100 is cheap compared to other prices I have seen. I won't step on anyone's toes, others can do there own research, but I feel that this seller is selling a quality of fish that is perfectly acceptable for my intended use.