Oh wow, this is incredible! I love the detailed pixel art combined with a more muted color palette. I like how you can dredge up debris and small vertebrates as well. This is such a clever interpretation of the prompt and a unique experience.
The sound design also really stands out to me; I think you did a great job selecting immersive ambience and effects that mesh well with the relaxing gameplay.
And of course, I love the Invertebrate Index! Finding all the creatures is definitely my favorite part about fishing games as well. :) I played yours until I stopped finding new creatures. I wasn't able to find any waterboatmen, freshwater amphipods, or planarian worms. Are these the invertebrates you have yet to add?
Really excellent all around, I will definitely keep an eye out for any updates to this project. :)