Det står lite i forumet på PlecoFanatics om varför sugmalar kan göra så...matbrist.
"A recurring theme on the boards are pleas for help, shock, and dismay from tank keepers whose suckermouth catfish are attacking their prize Discus, Gouramis, Silver Dollars, Goldfish, or any other fish with a large enough body for the suckermouth to grasp with their mouth. They are sucking the slime and sometimes even the flesh from the fish. Obviously, this is a very bad situation and an absolute no-no which could result in the death of the target fish. Sometimes it is a report that plants are being damaged, rasped and scarred. But this is again a fishkeeper problem, not a fish problem. The majority of the attack fish - and it can be any of the suckermouths - are fed nothing at all. They are scavengers, arent they? There is plenty of poop and other waste in the tank. There is algae all over my wisteria, why doesnt the 8 (or larger) sailfin plec eat it? A small minority is fed sinking wafers. I have never been able to confirm an instance of this extreme starvation behavior where the fish had regular access to fresh veggies. The sad part is that once this behavior is established, it seems to be hard to overcome. I suppose neurotic or psychotic fish are as conceivable as neurotic humans."
http://www.tomgriffin.com/aquamag/pleco2.html
