Picture is copyright Emily S. Damstra and used by permission. The deep-sea sponge Monorhaphis chuni (Hexactinellida) has the world’s largest known biosilica structure! A silicate spicule that can grow up to 3 meters long. That’s at least a meter longer than you! I don’t really know how to construe to enormity of such a structure. . . . → Read More: Huge Silicate Sponge Spicules and the Evolution of Calcification