Monorhaphis chuni is a deep-sea sponge that creates giant basal spicules (GBS) that can reach up to 3 meters in length and 10 millimeters in diameter. These spicules are the largest biogenic ...

You can pick up a synthetic sponge for just a few dollars. But a natural sea sponge, hand-harvested from the Mediterranean seafloor, could set you back $30. Harvesting these sponges is dangerous ...