I've heard of lemon oscars and I've heard of platinum oscars but never lemon lime. Maybe they just dyed or tatted an albino one or something? I would love to see a pic of it!
I agree it does sound died, but there are sunset oscars which are far from the coloration of wild oscars. I wouldn't be surprised to find out that yet another color strain of oscars was being bred. It would be great if you'd post some pics!
I have seen Lemon limes, blueberry, rasberry and others, Yes they are dyed, and in my opinion, I find them or any fish that is dyed or physically altereded not to my liking.
I've seen Lemon Lime O's before but not what your describing. I've see
ones that are Yellow with green speckles on the lower part on the body. They were dyed because my friend had bought them along with some green parrots.