It is either Heros efasciatuswas or Heros appendiculatus. The world fish organization has this fish classified as Heros efasciatuswas, but I read on a different board that a guy discovered an article that states that this fish was first described as Heros appendiculatus, so going by the rules of taxonomic naming this fish should be called Heros appendiculatus. It is in the same genus as the severum, Heros severus, and is very closely related, but still a seperate species (according to the world fish organization).
I have seen similar fish on several boards, but unable to locate one for myself
I have seen similar fish on several boards, but unable to locate one for myself