I’m not entirely sure what this means, actually. Apparently, the fish would be used as a medium for drug screening, replacing mice. I didn’t know you needed animals for drug screening.
Zebrafish are also the basis for the GM “Glofish”, raising the possibility that one day you’ll be able to have drug tests where if you’re positive the fish will actually change color depending upon the drug. (“Purple… That means you’re on Ecstasy!”)
(Via the Linkmeister.)