I know this is way premature, but I just wanted to get it out there.

Technically Coral is a living underwater tree-like organism. It would be nice if we could get dynamic Coral somewhere in the far future.

While many species of corals (which are actually animals) do have branching patterns they aren't quite extensive or large enough to function like trees individually.

Though having a coral reef expand dynamically as a whole may make an interesting mechanic, if a difficult to achieve one.

That's more or less what I was thinking. But I wanted to give it some thought before I closed it.