Dan - yup. Sustainable ag and done w/o pestacides is a great thing. And yes, I have seen some nice yields as well.
But "organic prawns"??? Of course they are organic - as is any other living thing. Raised w/o pestacides - probably. But I can't imagine them being planted in the ground.
Which reminds me of a Joke. You need to know that the featured university, Texas A&M (for ag & mechanical) isn't known for producing rocket scientists. And a 7 course meal there is a fried possum and a 6 pack of beer. Anyway, on to the joke.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Charlie graduated from Texas A&M as an ag major. When he finished, he became a farmer as he had always wanted to do.
At the end of the first growing season, he called the professor who had been his advisor during college. Poor Charlie was very upset.
Charlie" Prof, you gotta help me. Something is wrong and I can't figure it out.
Prof: Charlie, tell me the problem and we can get it solved.
Charlie: You know I started farming this year. I tried to raise chickens. But they all died.
Prof: Well, explain what you did with them and let's see if we can find what went wrong.
Charlie: I took 10,000 baby chickens, planted them neck deep in freshly turned soil, and watered them every day.
Prof: Well that's it then. Next time, don't water so often.