Managed to eat 15 shrimp. I very much enjoyed the concept of this game, and I like that some animals had their own light sources so they could also help you find shrimp without having to waste too much of your health.
One feedback I can give, if I may, is that the darkness of the sea sometimes gives the impression that you're not moving (or that you're moving slowly). I don't know what is the best way to solve this, and the problem was 100% gone whenever there was anything on the screen (an enemy, bubbles, a different background, etc), buy maybe having more details on the background would help.
Sound would do good as well. Other than that, good job!