Lemonfin barb (Hypsibarbus Wetmorei). Very much like a tinfoil barb. I bought four tinfoils back in 2015 and that was one of them! I didn't properly ID it until some time later.Btw,what is that great big light colored fish on the far left in the tank?
Beautiful fish, they'll hit 20" in the right sized tank. Mine has maxed out at about 16".