i would have to say that it really looks unusual for a sliver aro to have such red fins,
i guess the owner must have pumb it lots of red enhancing pellets.
oh well, but still $6 for a sliver is a good buy. go get it, and find out what has the owner been feeding it. haha
regarding the ruffled tail, if u find it an eye sore, do an operartion and trimp away the tail horizontally, but dont try at the roots of the fin.
given that its still quite small, the tail will grow back nicely soon, and plus u can confirm by looking at that the newly grown part , whether it still grew back as reddish as before..