Hello, I am newto the forum and in search of what the species of my guppy is. I bought him actually at a Wal-Mart and he wasn't a typical Fancy Guppy. He is a Clearish color that has the cobra black spots on his tail. When he is swimming in the lights and makes movements he changes to Green, Blue and Yellow. He looks like how the surface of a CD would look. Any one could chime in on this little guy?