I remember, many years ago, visiting a place in Malaya, which sat on stilts over the sea. Upon placing your order, the waiter would nod sagely, walk nonchalantly to the rail and then suddenly dive over the side, reappearing a couple of minutes later with a struggling catch in his hands. As a youngster this impressed the hell out of me. It was only much later that I realised that they had holding tanks under the restaurant.