Hey, really nice stuff so far! I really like the shooting animation and how the fish's eyes squint. This stuff all seems really solid to me! Maybe for the bubble projectile, it can have a more "squished" look, like it's traveling really fast. Or give it some small baby bubble trails. I think a wobble to the projectile might look good too. Just a few suggestions.
I feel your flop on land animation seems off in some way. Maybe it needs the eye on the other side of the face.
For the looping death animation, maybe you can have the fish struggle for one last breath while the fins extend out and flop like arms. I guess it all depends where it dies. Keep up the good work!