10 Main Characters of Porifera are given below:

  1. No definite symmetry.
  2. Body multicellular, few tissues, no organs.
  3. Cells and tissues surround a water filled space but there is no true body cavity.
  4. All are sessile, (live attached to something as an adult).
  5. Reproduce sexually or asexually, sexual reproduction can be either gonochoristic or hermaphroditic.
  6. Has no nervous system.
  7. Has a distinct larval stage which is planktonic.
  8. Lives in aquatic environments, mostly marine.
  9. All are filter feeders.
  10. Often have a skeleton of spicules.