Rare coral reef

Currently, coral reefs look nice, but in my opinion, they are overly cluttered with large coral blocks. I propose adding a new, rare reef variant similar to how jungles have their own rare variation.
Appearance:
A shallow biome with a sandy seabed. Large rocks with coral growth appear here only occasionally. There are also smaller rocks, likewise covered in coral.
Reason for addition:
This biome serves primarily as an atmospheric addition. However, it could potentially serve as a foundation for future updates.