Fish need exercise too

Entry #2: OK, I might as well get the embarrassing ones out of the way. 
I had a goldfish in college that I won at a carnival.  He was named Bradley.  A girl I was dating named him.  I'd have called him Spike or Butch, something like that.
Anyway, I noticed when drying off his bowl after changing the water, he would swim right next to the towel as I turned the bowl.  As I spun the bowl and the water started to spin faster and faster, he swam to keep up with the stationary towel.  One dollar idea #1 was born!
I envisioned selling motorized turntables, like a record player (old guys explain that to the young ones).  Stick the bowl on the turntable with something decorative and stationary on the outside to keep the fish attracted.  I could see the billboards.... Exercise your fish for health and longevity!  There would even be a series of complementary products...little hurdles and obstacles for the fish to swim over and around in the bowl as it turns, decals for the outside of the bowl that look nice as the bowl rotates and healthy fish food.  Blogger Time Out: If we eat fish and take fish oil pills for health, what do fish eat for health?  What are those little flakes of fish food made of anyway? 
Well my friends all thought I was nuts.  And quite frankly, I was just pulling their chains anyway.  Then a few months later, my roommate told me (well actually he prefaced it by saying "I really don't know if I should tell you this cause it might encourage you but...") he heard on the radio about a study in Scotland that found that fish that exercised every day lived twice as long as fish that just floated around all day.  So I wasn't completely nuts.
Bradley lived healthy and happy for the next year.  However that spring, at the same carnival, I won another goldfish, whose name I forget.  After what seemed like a reasonable waiting period, the new fished joined Bradley in the same bowl.  Within weeks both fish were dead from some fish disease I guess.  My roommate was fish-sitting for the weekend and had to call me at my parents house with the sad news.