The Largest Bio-Silica Structure on Earth: The Giant Basal Spicule from the Deep-Sea Glass Sponge Monorhaphis chuni
Lamellar composition of the GBS axial cylinder; light microscopic (a, b, d, e, g-i) and SEM images (c and f). The cross sections illuminated with red and green light; overlays from those images were computed. (g) A cross section illuminated with white light; the same section illuminated with green (h) or red laser light (i) to highlight that the axial cylinder is a better/more effective waveguide. The solid axial cylinder (> < cy) is marked.