I hate to rain on the parade, but GMO's are produced for one reason only and that is to make profits for the companies that produce them. Never mind fish genes, the biggest problem with them is that peasant farmers are being coerced into absolute dependency on foreign companies who will ream them so hard that they can barely survive. Already, there are laws being passed to prevent farmers saving their own seed, under some pretext or other, and with intense lobbying from the monsantos of this world. Buy gm seed from monsanto and you then spray it with round up, also from monsanto etc, and if you don't, your crop will fail. This is the exact opposite of all the work that has been done in the developing world promoting resilience among small farmers. The UN FAO has even come out and said that if we want to feed the world, then we need a massive increase in small farmers, in the uk context they would mean smallholders. If you wanted greater yields in Britain, simply split the hundreds of 1000 acre plus farms into tens of thousands of small holdings and you would have no need of gm crops in the first place. As for cholera, don't make me laugh, it's typically spread by infected water supplies, not from vegetables. If in doubt, wash your crops in clean water before you eat them. I spent over twenty years living in the tropics eating food from god knows where and I never got cholera and only had a bad dose of the trots a couple of times, which is what you'd expect in England with all our lovely plastic wrapped supermarket shit. As for the fish thing, I remember back in about 1985 seeing an article in Time magazine where they'd spliced a gene from a glow worm into a tobacco plant and made it glow in the dark. They were doing it to enable them to study the plant better, but the bigger problem is that we start splicing things and they end up going wild, cross pollinating and we end up with some really nasty weeds. Apparently most corn is now contaminated with gm genes by natural cross pollination. That's going to make it much harder to maintain pure seed stocks for hybridization or heritage seeds that need to be kept in case things go wrong and disease wipes out our latest super duper varieties. I have twenty five years experience of tropical farming and I can tell you that if you give a rats arse you should be very worried about gmo's in the food chain.