I'm going to assume you mean 'Koi.' To catch a Koi, get a fishing rod and fish at the rivers from 4 P.M. to 9 A.M. It'll take several tries to find a Koi.
To catch the koi fish you must go to the inventory and select the fishing rod the you assign it as the item you are using. for the xbox 360 you press the right trigger once it is in the water near a fish pres x very quickly it will the catch the fish.
catch every fish once
you have to catch every fish at least once
you buy a fishing rod from nooks for 500 bells and then you chuck it into the water when there is a shodow of a fish and then when the little thing at the end of your fishing rod gows under the water then you press 'a' and you will catch a fish.
firstyou need to catch 500 fish then you'll get a bamboo rod then catch 1000 fish to get a black rod then 1500 fish to get a pink rod the 2000 fish to get a gold rod
you put a fish costume on and the fish rod and you'll get it
rod
Regardless of the type of fish being angled the longer the rod the longer the cast will be.
FeebasUse a Super Rod.
A rod
You must have either a Silver or Gold Rod. You cannotcatch Medium fish with a Normal fishing rod or a copper fishing rod.