Hybrids

very annoying for a start, when you have a fish that may be a hybrid of a hybrid and you don't know what to be doing with it.
would agree with preserving rather than mixing and messing.
talking about preserving, Bala sharks. They are endangered in the wild, due to the aquarium hobby, over fishing, forest fires etc. they seem to get bought in, in huge amounts in some shops at a size of about 10cm sometimes little bigger...I wonder do customers be told of their eventual size(some sources say 35cm), and that they are happiest in groups??