I had 6 of them in my 300 years ago 4 of them were red tail about 9 inches one was a albino that grew to 16 inches in a year and a half unfortunately he gave up the ghost during one morning and then I had one that looked just like yours and he was a little longer than the red tails but not as thick. When I get my tank set up I'm going to try to get 6 of the the same "true tinfoil barbs" that you have. When I saw my first tinfoil about 35 years ago I said to myself that's the fish I want! By the way how old are your tinfoil barbs?