Really fun and I like the art! (And the funky music too!)
The gameplay itself is pretty straight forward and easy to understand.
The details on the corals are really good, and I like how you can suggest that all the fishes are dangerous through the use of blue, which is why I thought the squid in red is a good thing to catch! I'd suggest you to group it in similar hue to the other fishes if they behave the same way... ^^ But overall, very well done! I enjoyed it!