Known by other name, disco clam. The combination between the red colour manteled the whole body, and blue lights playing like tender blue lighting went on and off is just amazing come from a clam. It was discovered that the mantle edge contains one layer filled with silica spheres and the other layer does not have the spheres and is opaque to light. The silica spheres are nearly optimal reflectors for the blue light that predominates where the clam is found. These two flaps of the mantle act together to cause the brilliant flashing light that is characteristic of this clam.
My guide this time was Jack. Soft spoken, a little silly underwater sometimes, but has amazing eyes to find all those little critters.