Went to my LFS today and my Girlfriend & I picked out a Small Size Black Moor for $6.00 It looks healthy and so did the other moors in the tank but while at home acclimating our new goldfish i noticed it only had one tail when i thought black Moor Goldfish are supposed to have a split/two tails. Is the single tail deformity common and will it cause health/swim problems??? I know just from doing research on how to keep goldfish that the small ones in stores are not of top quality and the fish was cheap but should i return it??? i have a good relationship with my LFS so i know they'd take it back, but im also wondering if i should consider the whole "You Get What You Pay For" Argument. any advice or input is much appreciated thanks!