I believe there should be some kind of controls in place. And the expatriate fishermen work for local Qataris, so I think they might be keeping an eye on them too...

and i really do not think that the number of fishes would go down like that. Fishing's been traditionally practised in Qatar. The local authorities should be knowledgeable about it. I'm sure they would not allow the local fishes to die out due to excessive fishing. However I agree with the points that you raised. They are very valid.

Simpleman, life in Qatar is as you make it out to be. That's the sole reason why i'm posting these, to encourage people to go out and explore the place instead of sitting at home and thinking how there is so little to do here... sorry that I'm preaching again...