• Phylum: Porifera, sponges
• Class:
  • Common Name: Demosponges
  • Scientific Name: Demospongia

Demosponges are the most commonly encountered sponges. They are primarily marine species, but a few freshwater species also exist.

Demosponges are characterized by a skeleton made of spongin, which may be reinforced by siliceous spicules. The spongin provides elasticity to the sponge.

Demosponges include the most varied sponges in terms of shape and color. They can be found at all ocean depths.

Demosponges are found throughout the world’s seas and oceans.

The natural bath sponge you find in stores is actually the skeleton of a demosponge without siliceous spicules.