Anyone know how to catch Koi? (big goldfish)

[ChickNorris]

Don?t think their mouth are big enough

Maybe. Ive spent a good deal of time in fish ponds here & in Hawaii. I generically used 'noodling' but regularly catch large (ish) fish by the gills with out damaging them. Same principle but nets work too if they're not large enough. In my experience, even wild koi are predictable & can be caught with the right bait & snatch.