we bought half dozen comets at two different times last summer . later had some babies . lost some fish last fall and a couple over winter , had a parasite problem late in year . in any case had 16 fish earlier this year currently have seven as we've been feeding our ''pet'' [ his words not mine] blue heron . in addition to these seven we have 4 new babies . my question is will we end up with weird fish . i'm concerned with ''inbreeding'' ,that is, mother and father being to closely related . don't know if this is a concern in fishies or just animals higher up the food chain. thanks..........peace