Corals don't generate deeper in the warm ocean floor

The corals generated in the warm ocean don't generate deeper beyond Y=45. This makes the warm ocean quite empty on the deeper parts.

Step to Reproduce
1. Go to this seed and coords:

704291340
-645 36 674

2. Compare it with Java ones.

Observed Result
The corals don't generate deeper beyond Y=45.

Expected Result
The corals generate deeper on the ocean floor, just like Java does.