Mine has some weight to put on. Everyone's are thick. I'm hoping I'll get to see him eat unlike the rest of the catfish in my tank. He hasn't moved since he found his hiding spot.
Nice fish I have 5 of my own.
I find that the bigger the tank the more they like to swim.
Mine generally like to stay between the 120cm (4 foot) deep to 275cm (9 feet) deep range in my tank.
They were also called the dolphin catfish at one time.
I did not know why they got that nickname but when I observe them in low light conditions they occasionally do swim in all ranges of the tank from a few inches from the surface to the lowest 9 foot level. They swim along the sides of the tank boundaries in laps around the tank.
I hope you enjoy yours as much as I do mine.