Here is the full list of all 11 Pearls of Atlantis: The Cove trophies - there are 7 bronze, 3 silver and 1 gold.
Win 10 levels in a row
Match 1000 Pearls
Match 5000 Pearls
Match 10000 Pearls
Destroy 5 bricks
Destroy 100 bricks
Destroy a kelp
Destroy 80 kelp
Destroy 150 kelp
Win a single level with 15,000 score
Win a single level with 25,000 score