How many different species of sponges have scientists identified? 100 900 9,000+

Scientists have identified approximately 9,000 different species of sponges. Sponges are simple organisms that belong to the phylum Porifera and are found in a wide range of marine and freshwater environments. They are known for their porous bodies and their ability to filter water, removing particles and nutrients. Despite their simplicity, sponges play a crucial role in the ecosystem, providing habitat and food for many other organisms. The exact number of sponge species can vary depending on the source, as new species are discovered and some previously identified species are reclassified.