If you want an example of scientists just doing things for a science-y kick, look no further than the GloFish. Genetically engineered to glow in the dark, they serve little purpose other than looking pretty. The advertising blurbs says “They are a brilliant addition to any home, office, or classroom and they are perfect for hobbyists and beginners alike” and they come in 6 exciting colors. But is it right to mess with a fish’s DNA just to brighten up a classroom?The research apparently started with a noble aim in mind – the fish were engineered as pollution detectors, glowing helpfully whenever they came in contact with a pollutant. Creating the 21st century equivalent of coalmine canaries is questionable in itself, but then to apply this same gene-meddling to a commercial venture? It’s a bit bizarre. But they’ll sure brighten up your dentist’s office.