Cat fish are the scavangers and cleaners of the fish world.
They have whiskers and barbels around there mouths which they use to stir up the gravel in the bottom of the tank to route out any food scraps which is realy good for your fish tank as all the rotting food in your gravel causes nitrate levels in your tank to rise which is not healthy for your fish.

Corydoras catfish are a smooth armoured cat fish which originally comes from south America. They have two horn type rows of scales down there backs which is where the expression armoured comes from, this protects them from bites from other fish.

They are tolerant of realy bad water conditions and would in the wild live in pritty bad water.

They are a peaceful fish that wont attack other fish or show agression which makes them a great fish for a small tropical comunity tank which is where ours lives and with them only getting to 4 inches maximum length they dont need to be in a massive tank like other cat fish do.

They are realy easy feeders and will take pellett food off the top of the water but i have found by feeding mine like this it made him very lazy and he didnt forage as much for his own food so didnt serve the purpose he was brought for.