Other Oceans (Photographs by Wayne Levin)Millions of people visit aquariums each year. These showplaces are invaluable educational tools and, more importantly, provide a window into a mysterious world that few of us will ever experience firsthand. But that world is increasingly threatened by human misuse by pollution, over fishing, global warming. Accompanying the waste and devastation is a global trend toward building bigger, more fantastic aquariums. Marvels of architecture and