Here is the full list of all 12 Virtual Aquarium - there are Overlay Desktop Game achievements.
Create 5 fish
Create 10 fish
Create 30 fish
Create 50 fish
Create 100 fish
Max lvl up 5 fishes
Max lvl up 10 fishes
Max lvl up 20 fishes
Max lvl up 30 fishes
Max lvl up 50 fishes
Max lvl up 70 fishes
Max lvl up 100 fishes