IN InBengali Tel is oil and Koi is a type of fish called Climbing Perch in English ,its ability to survive out of the water for hours,provided it is kept moist. They are able to jump or climb slightlysteeper slopes when moving on the fields. It has an additional respiratoryorgan, for that they can survive in moist in long periods without water. Tel Koi suggest, Koi fish prepared in excess oil.Themarinated koi fishs are fried and then simmered in a medium thingravy made with chilies, and ginger and added with extra oil finished in awarm, spicy, cumin, flavored sauce and this is How To Make Tel Koi.