FIGURE 1.

Simplified structural 2-layer model of a faviid coral in x, z dimensions. The model assumes the dimensions of a massive faviid coral with ∼3 mm thick skeletal walls (i.e., the coenosteum), ∼10 mm wide corallites and a ∼2 mm thick living tissue layer. The model extends uniformly along y and shows three layers: water, living tissue, and skeleton. The dashed red line indicates the region modeled by the Monte Carlo simulation. The vertical solid red line indicates the position of light delivery to the top of the skeleton/tissue wall.