So about a week and a half ago I went to big als for the first time I'm my life and it's amazing in there but anyways, I picked up 3 female guppies since I have some males at home and I noticed that there was one guppy with a light neon green tail fin so I decided to get that but later after I bought her I noticed that her tail changes colour very quickly her tail changes to the colours yellow, green, blue, and a bit of purple. Most of the time she stays as yellow and green. Couldn't capture her with the blue and purple tail because she only stays like that for about 2 seconds while moving.