androgen inhibitor for prawn or animal

Dear Sir,

I am Ikhsan Khasani, researcher for fish and prawn. I has been conducting research about masculinization of prawn to make all male seed. I used metyltestosterone, the result unsucced. Now, I want to try some kind of androgen inhibitor (AI) compound. What kind of AI which suitable or affected for prawn?, and How to get the chemist?. Thank's very much for your assistance.

My best regards,


Ikhsan Khasani