TravisCroxall

Hi NordernAquariums - I've had a similar experience with ricefish fry. I had 10 shipped from Hawaii to Ohio and once they reached a sexable size, all are male. Disappointed with the ratio, I looked into it a bit. Turns out that starvation during the larval stage can cause genetically female fry to change to male. A period of 5 days is enough to cause the change, so shipping young fry can lead to a male-heavy ratio. Here's a post with more information : Medaka Sex Change.