Those were designed for medical research, Somewhere there was a promise made that these wouldn't get into commercial channels. Maybe it was't the developer making those promises. ;)

There are some very legitimate medical uses for a research animal where they can examine a specific part or system of a fish. Cancer research is a good thing usually.

While I was away, Phry's story about the Bizarrely-Gendered Guppy was run. Familiar with late blooming swordtale (the huge juveniles who become the biggest males and have generated stories of sex changing females) I wondered if that was the case for that fish.

Triploid fishes having three sets of chromosomes also occur, especially in lab work. I'm not sure that is the same as the xxy, xyy chromosomal situations that sometimes are found in creatures with specific sex chromosomes.

I'm quite sure Phry knows more about this than I though. ;)

What does (professor?) Yamamoto say about abnormal sexuality.  Does it apply to fishes?