probably the amazon catfish. i think it can get up to 300 lbs
It depends how big your Koi is and how big the Catfish is. If the catfish can fit in the Koi's mouth than it will get eaten.
1 pound
Giant Fish
It was caught in Thailand weighing 646 pounds
no if you are trying to catch catfish use clams. worms might work and big catfish will bite anchovies
I think its a catfish. http://www.extremescience.com/BiggestFreshwaterFish.htm
in lake wataga in Hampton there are catfish as big as volts wagons they are huge. know from personal experiances. there is a yellow pole where the swiming area is and you can get on it and stand up. one day we were all out there swiming and it started to rain and i happened to look down into the water and i seen a catfish bigger than me
12 in
The catfish that live in the pacific northwest get fairly big. The average size of these catfish ranges between a total of 40 and 50 pounds. These are also known as Channel catfish.
Lake Ontario towards Rochester New York
well ive seen some pretty big sturgen and muski but catfish get pretty big so just gessing i would have to say catfish or sturgon or muski