Natural sea sponges, silent residents of the ocean floor, are some of the oldest and most intriguing creatures in the sea. Belonging to the phylum Porifera, sea sponges have existed for over 600 million years—predating dinosaurs, flowering plants, and even insects. Despite their simple appearance, these creatures hold many secrets beneath their porous surfaces. What Are … Continue reading Secrets of the Deep: Fascinating Facts About Natural Sea Sponges