"-ED" wrote in message
news What has science come up with today that allows tropical fish to exceed
their normal size?


Don't know what you're looking for but I can tell you about Guppies. They
started using steroids in the 60's to produce bigger, flashier, faster
growing, and more colorful fish. At some point I stopped seeing those fish
when the Asian market flooded the stores with nice and cheap product. The
problem was that they were treating these fish with anti-biotics to avoid
losing stock before shipping. When you got them home they often died within
a week. Todays guppy strains are so weak it's alarming. Go into your LFS and
look at the guppy tanks early in the morning before they clean them out and
you'll see as many as 1/2 floating. When I was breeding guppies, they were
so hardy, you had to constantly cull them, or you were overcrowed in a
matter of months. Now you're hard pressed to keep them alive at all. Is it
because of the steroids, or the anti-biotics? I don't know.


--

JK Sinrod
www.sinrodstudios.com
www.MyConeyIslandMemories.com