Here is the full list of all 17 Coral Cove achievements.
Reach a score of 150 or more in a single game.
Reach level 4 in any game mode.
Give aquatic life a home by building your first level 5 coral.
Place 100 corals.
Complete the tutorial.
Place 1 000 corals.
Place 10 000 corals.
Place 25 000 corals.
Place 2500 corals.
Clear 10 dead corals.
Clear 100 dead corals.
Clear 1000 dead corals.
Reach a score of 300 or more in a single hex-region mode game without losing a single coral to the shockwave.
Reach a score of 1000 or more in a single random-region mode game with all modifiers enabled and without using undo.
Build 4 level 5 corals on the fertile tiles around the center.
Merge a coral only to lose it to the shockwave immediately afterwards.
Shield a coral farm that is not connected to the center and watch the game win itself.