Your sketches have great shape and flow to them! They really capture the movement of the animals and your style really pushes through with these. They have great personality! I really like the fluidity of the otters on the first page and the fat fish at the bottom of the last is really cute.
I really like the playfulness of your style. There is a nice personality in your drawings. I feel like you could play with perspective a bit more. A lot of them are either from the side or front.
I really enjoy your stylized animals, they are very playful and adorable. I also enjoy that you added small texture/pattern in the drawings, it definitely adds more character to your animals.