despite breeding or not, the walking catfish is a bad pet in general, as they can escape and live for months outside the water, they often go into "dormancy" by burring themselves in mud for several months till the rainy season comes back.
They stand on their tail and fins a lot, because this is how they "walk" they use their tail and pectoral fins as "legs"
I wouldn't recommend this fish to anyone, they can grow to 60 cm which is about 2 feet in the USA. they need very large tanks well over 4 ft wide and 8-10 ft long as adults, they need a good sturdy lid that is weights with bricks or can be clamped tightly shut.
here is a good article, the only thing wrong with it is the tank size it mentions is far to small. but it does discuss breeding, which in captivity can not be done inside a tank.
Walking catfish