Bruce has been measured at a whopping 40cm long, which is as big as some cats!
Bred by two brothers in Hong Kong, Bruce is becoming a celebrity, and loads of people who exhibit fish want him for their pond.
Fishes bring you fortune?
In Asia, a big fish is thought to be a lucky money spinner, and has prompted ornamental fish fans in Beijing, Singapore and Hong Kong to fight for the right to put Bruce on show.
Owners Jackie and Louis Chan say Bruce is so big because of special food and a special pond, which gives him loads of room to exercise.