The short story tells about a future of aquaculture. Writer, lecturer, skin diver, travel expert, and interpreter of science for the lay audience, Arthur Clarke is not quite all things to all men but he is giving it a good try. He helped British pilots outwit the Luftwaffe in the Battle of Britain. He was one of the founders of the British rocket society. He has had no fewer than six sightings of UFOs (all of which he explains in non-saucerian terms). And, in general, he has shown a remarkable capacity for being where the excitement is, and coming back to tell the rest of us about it. He is also a science fiction writer at the very rarefied level of general excellence shared by only a few. You already know this, of course; but if you didn't you would soon learn in reading—