All i did was put it in photoshop and press 'undo' brother,the vibrance and saturation were slid right up,wether you did it on purpose or mistake i don't know...but i do know I have seen this fish at Maidenhead and they look just like the 'undone' picture i posted up...a yellowy white colour,also the same as it looks in that link.
Take a full tank shot,without messing with Saturation etc and post it up.
so we can see if your rocks and substrate are still 'bright green' (which happens when you mess with RGB functions)