In order to progress in the game, Main Quests have been added with their own stories. Completing each section of the Chapter rewards you with shells to use on Explorations , and completing the entire Chapter rewards you with Ancient Coins and a pityful amount of Vitality.
Tap on the bottom left icon that looks like the coralite to access the main quests.
Prologue 
Edit
Reward : 10 Vitality
Harvest 3 Vitality
Chapter 1 : Lonely coralite Edit
Reward : 50 vitality, 30 AO
Own 3 fish
Harvest 4 Coral fragments
- From coral factory
Unlock 2 colonies/coral
- Two per island/area
Summon 1 fish with pink snail recipe
Reach colony level 4
Create 3 level 3 fish
- Tap on fish bubbles
Reach coralite level 2
Own 5 fish
- Can be any fish
Reach colony/coral level 7
- Upgrade any to level 7
Harvest 10 coral fragments
- From coral factory
Reach coralite level 3
Chapter 2 : great coral tree Edit
Unlocks :
- Coral Tree Hill Island/Area
- Tier 2 Fish
Reward : 150 Vitality
Expand to the next island
Unlock 4 colonies/coral
- Two per island/area
Unlock seaweed factory
Harvest 6 seaweed fragments from factory
- Use AO to obtain them
Get coral fragments from the coral tree 1 time
- 3 hour cooldown to get 200
Own 3 decorations
- Can be any decoration
Reach colony/coral level 10
- Upgrade any to level 10
Complete exploration 2 times
Place 1 pink pinwheel
- Expansion item
Reach coral factory level 2
Reach seaweed factory level 2
Upgrade coralite 1 time
Chapter 3 : the clean sea and fish Edit
Reward : 150 vitality
Own 10 fish
Complete exploration 4 times
Summon fish 1 time with green snail recipe
Achieve 55 maximum air bubbles
Summon 5 fish
Harvest 30 seaweed
- From seaweed factory
Reach level 6 coralite
Own 15 fish
Reach colony/coral level 15
- Sunset Branch Coral
Chapter 4 : treasure inside giant clam Edit
Unlocks :
- Giant Clam Habitat Island/Area
- Tier 3 Fish
Reward :300 vitality
Expand Giant Clam Habitat
Get shells from the Great Clam 1 time
- You need to use pearls
Unlock 6 colonies/coral
- Two per island/area
Unlock Coral Factory
Place 2 small rocks (expansion)
- Settle fish in exploration for blue scales
Complete exploration 10 times
Achieve 85 air bubbles
Achieve factory level 6
- have factories with a combined level of 6
Chapter 5 : how fish swim Edit
Reward : 300 vitality
Create 2 fish using the "White Dice Recipe"
- Obtain from exploration missions
Upgrade two fish to their next level
- Tap on their bubbles
Complete exploration 10 times
Get 3 stars in 4 exploration areas
Get 2 "red dice recipe piece"
- Obtain from exploration missions
Own 15 decorations/expansion items
Have 6 max level colonies/coral
- There are two per island. You will need to upgrade the coralite to get max levels for all
Achieve factory level 9
- have factories with a combined level of 9
Own 25 fish
Chapter 6 : light that illuminates the deep Edit
Unlocks :
- Eternally Shining Lighthouse Island/Area
- Tier 4 Fish
Reward : 1000 vitality
Expand Eternally Shining Lighthouse
- Unlock the Lighthouse in the top right
Get Pearls from the Lighthouse 1 time
Place 2 Small Pillars
- Expansion item “small pillar”
Own 27 fish
Upgrade Coralite
- Upgrade it one level
Complete exploration 15 times
- Any level you want
Summon Fish 2 times with Colorful Beach Ball Recipe
Achieve 130 Air Bubbles
Achieve Factory Level 12
- have factories with a combined level of 12
Complete Turtle Shell Grave Exploration 3 times
Place 1 Small Terrace Rock
- Settle fish in exploration for the blue scales
Chapter 7 : Power of the Mystical Pearl Edit
Reward : 1000 vitality
Upgrade Coralite to level 11
Complete exploration 10 times
Get 3 stars in 8 exploration levels
Own 30 Decorations
Have 8 Max Level colonies/coral
Achieve Factory Level 16
- have factories with a combined level of 16
Own 30 Fish
Achieve 8000 Decoration Bonus
Chapter 8 : Sunken Pirate Ship Edit
Unlocks :
- Octopus's Pirate Ship Habitat Island/Area
- Tier 5 Fish
Reward : 3000 vitality
Expand Octopus’s Pirate ship
Place 1 Smiling Statue
Complete 15 explorations
Summon 2 Fish with Shiny Swimming Goggles Recipe
Upgrade Coralite 1 level
Own 35 fish
Complete Fish Upgrade 6 times
- Upgrade 6 fish to level 3
Achieve 190 Air Bubbles
Achieve Factory Total 20
Place 1 Prim Statue
- Settle fish in exploration for blue scales
Complete Long Rift Valley exploration 5 times
Get 4 Flamingo Tube Recipe Pieces
- Long Rift Valley Exploration level
Own 100 decorations
- Event Decorations count towards this goal. It will take you a while
Chapter 9 : Clean Sea Edit
Reward : 3000 vitality
Reach Coralite level 14
- cost : 49379 vitality, 17776 coral fragments, 7900 seaweed fragments
Purify 2 pollutants (trash)
Complete 25 explorations
Get 3 Stars in 14 levels
Summon 3 fish with "Rainbow Tube Recipe"
Place 10 max level colonies
- Have 10 corals at their max level, two per island/area
Achieve factory total level 25
- factories with their levels totalling 25 together
Own 45 fish
Achieve 14000 Decoration points
- oh my
Chapter 10 : Fish Encased in Ice Edit
Unlocks :
- White Snowy Plains Island/Area
- Tier 6 Fish
Reward : 6000 vitality
Expand to White Snowy Plains
Place 3 'Small Snowball" expand items
Complete Exploration 20 times
Summon 3 fish with the "Ballerina Music Box" Recipe
Own 50 fish
Complete fish upgrade 8 times
- Level up 8 fish to level 3
Upgrade coralite 1 time
Own 150 Decorations
Complete Red Sandy Field Exploration 3 times
Get 8 Shiny Snowball Recipe pieces
Upgrade Colony/Coral 55 times
- upgrade both corals on this island until you complete this task. It sucks.
Achieve Factory level 30
- total factory levels at 30, not each one
Purify pollutants 3 times
- the trash on the islands
Place 1 White Bear Statue
Summon 1 fish from the Ice Crystal
- 50,000 vitality per cast, with various other materials
