Sea Sponges a.k.a. Poriferans, are the simplest of animals. They don't have any real tissues, nerves, muscles, or internal organs. There are currently 5,000 known speices of Poriferans. They are also generally asymmetrical in body shape, sessile, and marine dwelling. They generally live in the intertidal zone, which at low tide is exposed to the air and at high tide is submerged underwater. However, some sponges may live at depths as deep as 8,500m. The sponge creates hard structures within itself called Spicules form the skeleton. Other sponges use Spongin instead of Spicules, spongin is stronger and softer than spicules.
DID YOU KNOW? They can grow to be 4 feet long that is the biggest sponge ever recorded.
No comments:
Post a Comment