Pictus catfish are particularly greedy when it comes to feeding time, and their bellies tend to resemble a marble once they've gotten their fill, and they typically will live off of this swolen sack of food for several days before needing to eat again. (though they may elect to eat a bit here and there inbetween) The one in your picture does seem to have a slightly larger protrusion than normal, but based on how my pictus looks after gorging itself on some shrimp pellets, I'd say that its within normal bounds. If anyone feels that this is an inaccurate analysis, by all means, please let me know. I've had my pictus cat (and an eclipse cat) for approx. 4-5 months now, and when they eat, boy do they EAT!