Vieja synspila? (pics)

[HerCrenVie]

I'd say Zonatum.

I agree. That also explains the aggression level. Zonatus is one of the most aggressive Paratheraps species. It's awesome-looking though.

 

[BlueKiller82]

In spanish, but shows good pics of different viejas and other fish.

http://www.aquaciclidos.net/nuke/modules.php?name=Forums&file=viewtopic&t=5978