I have had several monster fish but I have never verified that these are in fact poisonous in fact I suspect this could be conjecture I had mine for two years untill a recent tragic accident wiped 80 fish out of existence in my living room plus 300 feeders. They will eat when ever the opurtunity presents itself i.e. a fish passes to close to there mouth if any one knows where to get some i am desperately looking for more and also true leaf fish I realy enjoyed them the monster fish eat in an explosive fashion. Mine were kept in a 55 gallon with a bottom covered in black sand about 2 inches deep. i would not keep them with aggressive predators or ones that will hog the live food because they will not go after the live food they wait for lunch to come to them. if some one could show me the articles on breeding I would love to read that i do not think there is a large amount of information realy on the species it seems to be largely over looked for some of the more flashy bell and whistle predators in the industry. Personaly I like the ninja stealth predators and I am actualy looking for more varietis of fish that are ambush predators