Get hold of some dog bickys. Chum mixer is best if you can get it. Chuck a few handfulls out to get the koi on it. Suoer glue one biscuit onto a hook (size 6 or 8).

You dont need any other terminal tackle apart from a hook, unlees you need a bit of distance. Then you can just use a see through bubble float or a cork threaded on the line. Flick your bait out so it is sitting with the freebies, and wait.

This method is killer with a partly inflated earthworm sometimes. Good luck, and dont forget to bang them koi on the nut.

I can remember doing that as well Penguin, though it was usually Mum who was giving us the third degree for skiving off with her dishwash liquid.  Then there was always the temptation to test out the new skating rink

Ive seen people spend ages trying to find worms. Under Cowpats as mentioned,  timber but an electrical current is almost instantaneous.

Most farms here in NZ have an electric fence system of some description and i'm sure the cocky (if you are on his property) wouldnt mind you utilising it for a short (pun intended) time. LOL just dont leave a permanent "short" though as that could be bad for your health.

I'm dead keen to hook on to some of the Koi we have here and what you have mentioned about worms is going to be hot on my list of things to  try.

And Uncle, if you ever want to try a portable unit on Seaworms i have one here you can use. I'd be interested to see if electricity has the same effect on them as Earthworms. Might even work on those small shrimps.

Kraken. You would have to ask the fish that one mate.

You dont have to inject them with oil. Plain air will make them sit up in the water and can be a killer method.

Rainman. When I was a kid, much to my old mans disgust, I used to sray the lawn with a quite strong solution of water and washing up liquid. Sit back and wait 5 mins. and the worms come to the surface....easy peasy.

It doesnt make for a very pretty lawn after a while though.

One easy technique for extracting worms from the soil is to run an electric current in the ground. Electric fences are ideal. Just short the wire to earth and any worm in the vicinity will head for the surface. 

Wonder if a portable electric fence unit would work on your seaworms in the same manner Uncle. Connect the unit to a couple of probes pushed into the vicinity of a worm hole...... could be worth a try. 

just turnover a half dried out cow paddy and you will find it full of big fat earth worms i use to collect them to bring the gold fish into breeding mood.....