Ceptopsis are very cool, You might remember them on that program "Abiss" a few weeks ago on the Disco Channel as the fish devouring dead meat thru a nylon net that they had chewed through. Their enitire skull is one massive muscle. It's from Peru/Brazil out of the Amazon. We get ours out of the Nanay river I beleive. It will get about 1.2-1.5ft. Females have more girth. They are a deeper water fish that are active in the dark. I had one that swallowed a lazor cory the size of his head and lived to see another day. Big fish only with this guy. They look like a shark when they eat.
Cetopsis coecutiens is it's scientific name. Great fish with it's agressive personality and great coloration.