Hi I'm new to the fish aquarium world. I have a fresh water fish tank with some Guppies, Platy's and Cori's .. I recently bought some snails but to my surprise when I got home there was a mystery fish with them tried to contact the store but they since closed down so I have no clue what this fish is but it's been swimming and living amongst my other fish for a few weeks now no problems curious if anyone can name this fish. It's silver with sort of a yellow tail but when the light hits there is a shiny blue to him