The fish below can only be unlocked when you purchase the indicated package through microtransactions.
Buy the Junior Package.
Black and White Clownfish:
Buy the Beginner Package.
Buy the Advanced Package.
Buy the Master Package.
Buy the Supreme Package.
Unlock New Fish:
Complete the following tasks to unlock the corresponding fish.
Take a picture of a clownfish 3 times.
Share a picture of a blowfish 3 times.
Take a picture of a tang 5 times.
Save a picture of Lonely Coralite 3 times (This is what the game says, but it seems like a bug. To truly unlock the Commerson Dolphin, save a picture of a dolphin 3 times).
Leave the app open and active, but do not touch it or do anything else for an hour.
Take a picture of a damsel 3 times.
Save a picture of an angelfish 3 times.
Save a picture of a shark 3 times.
Tap the upper left corner of the screen a thousand times.
Juvenile Spotted Boxfish:
Start the app by clicking on a notification. You have a 10% chance of unlocking the fish after not playing for 2 hours.
Open 50 Mystery Chests.
Play at midnight 10 times.
Share a picture of a sting ray on Twitter 3 times.
Take a picture of a jellyfish 10 times.
Take a picture of the Mystery Chest 5 times, being sure to focus on the chest and not the Coralite.
Tap the top-left corner 5,000 times.
Play the game 20 times in one day.
Share a picture of a seahorse 3 times.
Play at 4:00am 5 times.
Take a picture of a goby 3 times.
Click the 'see more' button in the Photo screen 10 times.
Click the Twitter button 10 times in the settings menu.
Spotted Mandarin Dragonet:
There's a small chance to unlock this when you open the app from a notification.
Share a photo on Twitter 3 times.
Simply take a picture of the marlin when it visits. There's a small chance of it swimming by once every half hour.
Much like the spotted boxfish above, simply start the app by clicking on a notification. You have a 10% chance of unlocking the fish after not playing for 2 hours.