Peter Unmack replied:
>Only way to tell is to breed the deformed fish and see what the
>offspring are like. Unfortunately no one ever tries this, everyone just
>calls it genetic when often as not I feel most of it is likely
>environmental. Why don't you breed them, see what you get and write an
>ariticle on it? :-)
I may just do that Peter, I am quite short of tank space at the
moment though.
Thanks for the suggestion.
Regards
John Grylls