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 ...

During the dives, researchers noticed some unfamiliar-looking zoantharians living on a sea sponge, the study said ... in cave ...

A colony of sea sponges can pump as much as 1,000 Olympic-sized swimming ... filtering water and providing structures for organisms to hide in or lay their eggs on. Ana says, 'They ingest a lot of ...