Here is the full list of all 11 Fishy 3D achievements.
Beat the game in under 8 minutes.
Collect all stars.
Collect all moons.
Beat the game.
Beat the game without eating meat.
Maybe this time...
Get eaten.
Eat a fish straight from the sewer.
Where are you going?!
Become really big.
Complete the game with all stars and moons.