Click the Green Flag more than once, and you'll see what I mean by random. Also, this is not the final version.
Update log: Version 1.0: game was made. Version 1.1: Added more seaweed/sea-grass along with new coral, sand, bigger and more frequent bubbles, and a fourth fish that's either white, black, or 3 shades of grey. Version 1.2: Added background sand, another foreground sand costume, and more texture to the bubbles. Version 1.3: Gave bubbles more texture, and added sand particles (credits to ZonxScratch for the code). Also, one of the fish has a 50/50 chance to be Nemo. Version 1.3.1: Didn't add anything new, just made the first colored and non-gradient fish only be warm colors, the other only cool colors, and changed the 1/2 chance of a fish being Nemo to a 1/5 chance.