I have to say this is a super interesting idea. I like how you don't need to fight the enemies but rather follow and avoid them to collect their scales. I also really like the look of the game. The small bubbles from the robot or the caustics on the ground make it really immersive.
The only criticism I have is that I don't really get the point of getting damaged. Does it actually do something?
Besides that, I think this is an awesome entry and a really unique idea I haven't seen so far. Good job!
And can I just say that the Moray scared the shit out of me the first time I encountered it haha