> Will I find colour variations or body shapes of the same Rainbows in
> different creeks or would that just be the stage of maturity they are at?
Different populations often show different colour patterns, sometimes subtle,
sometimes very different.
> I've put one of the female fish with no spot in with my son's guppies, 2
> weeks ago, now it has the black spot, is it a guppy or can Gambusia cross
They don't cross. Feamles store sperm, hence they always tend to be pregnant,
hence they don't need males very often. Look at the picture on
http://www.peter.unmack.net/gambusia these fish are dead, but they look similar in
real life as far as the spotting patterns.
> Sorry to bug you with so many silly questions I'm just hungry for
> knowledge(I'm also not good at spelling)
Only way to learn is to ask (and/or read). You should a couple web searches
though, and read over Adrain Tappin's site which is a goldmine for information
on popular Aussie natives. http://www.ecn.net.au/~atappin/home.htm