What is the difference between fancy guppies and non-fancy guppies? I know I've heard of "feeder guppies" and I think those are the "regular" kind. Is the difference mostly a lack of bright colors and possibly that they're smaller?
Yes... actually the fancy guppy is not a breed which you can find in natural / wild habitat.
Its actually a result of the selective breeding of the wild guppies over the period & generations.
In wild only wild guppies are found.
Ans to your que:
The difference between the two is as follows:
01. Wild guppies do not have much colors & facy have the same.
02. Wild guppies are comparatively small in size & fancy are big.
Hope this helps.
Lots of other aquarium fish varieties are developed through selective breeding, inbreeding and culling. This produces the target characteristics, but it can also result in genetic defects.
Thanks John for that valuable input.