That was difficult!! Spilota and Vittata look almost identical in some cases!!
And If I am honest, my first thought to search was Copella arnoldi (knew that wasn't it though) and go from there ad the jump from the Copella to Pyrrhulina was a fairly quick one.
Its not just about knowledge of the fish but how to search as well. Though... you have to have an idea in order to search lol
Darn... you scuppered my fish plan Wills!! No way am I going to have you trying to guess a South Am cichlid for me
Full scientific name for this stunner if you please none of this 'electric blue cichlid' nonsense