I learned this lesson with my bullhead catfish, but I thought that is surely wouldn't happen with goldfish, right? I put some little 3/4" babies in with some small 3" adults in a tank that I keep the goldfish in during the winter. I thought that they were too big to fit in the adult's mouths, but I started with 7, I have 5 now. Now I got to figure out what to do with them. Ha Ha, I really don't want to set up another tank. I lost a few this summer to raccoons, so I kinda want to keep a few to replace them. Probably nothing interesting to the serious fishkeepers here, just thought I'd share...