Quite cozy! I did like the Animal Crossing-style ease of losing track of cohesive thought and letting life become fishin' for a good while! I dig the cute pixel art, and the pretty deep blend of mixes for the different 'dachis that you can discover... reminds me of those alchemy games where you collect elements and then blend them together. A good base for a hybrid-cute/horror type!
Fish quantity definitely comes to mind, when coming back up. Could imagine an upgrade system that would help alleviate that as the player gathers more ingredients over time, some sort of scaling could be good. The primary difficulty in the game lies in the player's ability to go deeper with the same parameters (anchor size, level design, and depth sink/return rate)... I'm wondering how else you could spice that up!
Beyond that, can definitely picture where you could go with this! More lakes or bodies of water, deeper (fathom gauge doko), more varied biomes, more 'dachis, maybe more things to mix, possibly even a "shop" of sorts to "sell" the 'dachis or byproducts of the deep... could even do some subtle worldbuilding with the eldritch buildup or deeper progression! Thank you for submitting 🙇♂️