Are you sure these aren't "kissing fishes"?
While not as ambitious as the rest of these, for someone who started doing these challenges with not much knowledge, and even less skill at PhotoShop, I've learned so much by doing them. This is something I've never tried before.
Had one heck of a time getting the layers where one fish wasn't upside down (Ooooh, that means they're dead, right?)
Here is my version.