Make sure to "taper" off the structure for that same Depth of field you need to aim for, also for maximum coral space :)
Here is a great example. It is only on one point with one main structure. notice the movement and shapes of the rocks. Great play with shadows and highlights. If you look at the one structure they still managed to hit two intersecting points. Thats what makes this look go good to the eye. Make sure to "taper" off the structure for that same Depth of field you need to aim for, also for maximum coral space :)