Genshin Impact fishing is a big part of update 2.1. Here
Genshin Impact fishing spots (updated for 4.2) - Polygon
Genshin Impact 2.1 Update: All Fishing Locations to Get the Catch
How To Get The Catch in Genshin Impact (All Fishing Spots)
Version 2.1 Update Preview: Fishing Gameplay Details
Genshin Impact - How To: Obtain the Pool of Sapphire Grace - Redorbit
Genshin Impact fishing locations – how to catch fish
Page 330: Guides
Page 84: OMG Guides
ULTIMATE Fishing Guide for R5 Catch in 1 DAY! Genshin Impact