I Am Fish

Jut thought I would add a quick guide just so people can know where this unlocks.

The good news is that it is story related. Once you have got all 4 fish to the sea, the next level is called “finale”.

Once you start up the finale level, the achievement will unlock immediately. As such all nice and straight forward. Good luck!!

To get this achievement, you will need to get all four different fish to the ocean. Then, a finale mission will appear that you can start up that will get the achievement.
Want to know how to get to this point? Having troubles getting the goldfish, flying fish, piranha, or pufferfish to the ocean? Check out my other walkthroughs:

Goldfish playthrough

Pufferfish playthrough

Flying fish playthrough

Piranha fish playthrough