Genshin Impact has released a fishing system with the 2.1 update. By talking to Nantuck and completing the Exploding Population quest, they can unlock the new system and three fishing associations across Liyue, Mondstadt, and Inazuma.All three Teyvat nations also have several fishing spots that contain different types of fish. Liyue is no exception, and these are thirteen locations in the region where players can farm fish.All the locations to find Rusty Koi fish in Genshin Impact 2.1Rusty Koi is one of the three fish required to obtain 'The Catch' polearm.#GenshinImpact #rustykoi #Inazuma #Baal #KujouSara #raidenshogun #ei pic.twitter.com/QBymIEieko— Sportskeeda Genshin Impact (@GenshinImpactSK) September 3, 2021Best Genshin Impact fishing locations in northern LiyueIn total, Liyue has 13 fishing locations. While ten locations can be found in the northern Liyue region, three locations are towards the south.All the thirteen locations have been marked in the image below:Fishing Locations in Northern Liyue (Image via Genshin Impact)The fish categories found in each location are as follows:Location 1MedakaBrown ShirakodaiBettaLocation 2CrystalfishDawncatcherMedakaBrown ShirakodaiLocation 3Brown ShirakodaiDawncatcherSweet-Flower MedakaMedakaBitter PufferfishLocation 4Brown ShirakodaiDawncatcherMedakaSweet-Flower MedakaLocation 5Akai MaouBettaBrown ShirakodaiGolden KoiRusty KoiSweet-Flower MedakaLocation 6Abiding AngelfishCrystalfishDawncatcherMedakaSweet-Flower MedakaLocation 7BettaBrown ShirakodaiCrystalfishMedakaSweet-Flower MedakaDawncatcherLocation 8BettaCrystalfishMedakaLocation 9Akai MaouBettaBrown ShirakodaiGolden KoiRusty KoiSweet-Flower MedakaLocation 10Tea-Colored ShirakodaiSnowstriderMedakaLunged SticklebackIt is worth noting that the tenth location is located in Dragonspine region.Best fishing locations in Southern LiyueThese are the locations where players can find fish in Southern Liyue:Fishing Locations in Southern Liyue (Image via Genshin Impact)These are the fish types available in these locations:Location 1Sweet-Flower MedakaCrystalfishBettaLocation 2BettaCrystalfishPufferfishSweet-Flower MedakaDawncatcherLocation 3Akai MaouBettaBrown ShirakodaiGolden KoiRusty KoiSweet-Flower MedakaBy farming fishes in these locations, Genshin Impact players can unlock a wide range of rewards. These include weapons such as The Catch, Serenia Pot items. and fish bait recipes.The Catch Polearm is available at the Inazuma Fishing Association. On the flip side, Liyue Fishing Association and the Mondstadt Fishing Association sell the Serenia Pot blueprints and fish baits, respectively.The latest Lunar Realm event in Genshin Impact is also based on fishing, where players can pile up a ton of free Primogems by catching some fish daily. Hence, it is safe to assume that fishing will become an important mechanic in the game with future updates and events.