This is a good game in a lot of aspects. First, the fish collection is diverse and not just a reused asset from other fish (although there are the U, C, and N fish). Not only that, but each of the fish descriptions is also written well enough that it doesn't feel bland or rushed. I also like that you are more likely to get the fish that you never caught before in this game.
Last but not the least, the animation is superb. Each round of fighting the fish has some hilarious stuff going on. Love it. If I could ask for something, please add round 7.
I streamed the game here around minute 50 in case anyone wants to watch it.