I think GloFish® are awesome, and see nothing wrong with
owning them if you don't mind their unnatural colors.
Danios are good docile schoolers, but they crap a lot.
I'm a major fan of responsible genetic engineering

Danios natural habitat is south asia. I hope the GloFish®
people are responsible enough to NOT sell any fish there.
the idea of owning a copyright to a fish (no breed policy)
is not new. the USA department of agriculture enforces
such patents on hybrid grain feed used all over the World,
such innovation (like the pharmaceutical industry) would
grind to a standstill were such products not protected.