Generally speaking:
- Do all montis grow in that plate formation like a cabbage? Sometimes photos seem like they're encrusting, but maybe it's just how they were positioned.
- How do you know if they're encrusting? Is there a way to force corals to form a crust?
- Can you train digitata or birdsnest to grow a certain way, similar to bonsai?
Great questions. No, not all monti’s grow the same way. “Montipora” is actually a genus, not a species. And different species have different growth structures. Montipora, specifically, exhibits a lot of variety.
•Branching Montipora (such as Digitatas)
•Encrusting Montipora (such as Rainbow Monti or Poker Star)
•Scrolling Montipora (such as Beach Bum)
•Tabling/Plating/Bowl Montipora (Montipora Capricornis aka Monti Cap, Montipora Turberculata...)
Many corals will encrust at least a small portion of rock (a few millimeters to inches) before growing branches if they are a branching type.
You’ll know if they’re encrusting by their species. However, there are some visual signs that can indicate the type of growth to expect. I can dive into that if you want to upload specific example photos of corals.
Can you force them(non-encrusting corals) to form a crust?
•That’s a tough one; but sure. If you cut up a coral into a bunch of pieces and place the pieces all over a rock, each piece will like take hold of the rock and essentially encrust the entire rock as it then starts to grow in its natural pattern.
Can you train Digi or birdsnest to grow, similar to a bonsai?
•Yes and No. Whereas with bonsai trees, you can simply use Baylor wire, with corals to get this effect, you will manipulate the corals using light and flow. Most Corals will grow in a manner that exposes them to more light, and will be encouraged to do so in the direction of water flow. (Example below) knowing this, you have limitations to what can be done that wouldn’t apply with bonsai trees. This is because a bonsai tree is a singular organisms, and coral is a colonial collective.
Example: if you put a branching coral in front of a pump blasting it with water (assuming it’s not too much for the coral to handle), then over years, this coral will grow in a manner that looks like it’s blowing away from the pump. Imagine it like a tree blowing in the wind, in a side swept manner.