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 ...

Your browser does not support the video element. Sea sponges, among the oldest creatures in existence, let out what looks like a deep sea "sneeze" to filter out waste ...

Sea sponges are one such creature, and they come in many shapes and sizes. As surprising as it seems, one particular variety of sea sponge, called a glass sponge, shares something in common with ...