Phylum – Porifera (Pore bearers)

Phylum – Porifera (Pore bearers)

These are multicellular, aquatic organisms. They are commonly called sponges. They have a cellular grade of organization without the occurrence of tissues. The body has many pores called ostia and osculum for circulation of water. The body wall contains spicules which form the skeletal framework. They can reproduce both by asexual and sexual methods.