There are quite a few Crenicichla species around these days and some do have the caudal spot. I think those are definately juveniles and the adult colouration will differ somewhat to what we see in your pic. Perhaps someone in the cichlid secton would be more qualified to point you in the right direction.
Regards
BigC
again definatly lugubris pikes. and it isn't surprising that he befriended the danio as juviniles these fish are actually very very very "friendly" the almost seem to need contact with other fish. but don't be fooled they do grow HUGE and they have even bigger appities. the danio will become dinner. if it isn't killed for pleasure first.
as to the ID well I don't think that it is SP. Venzuela see this article.