Classification:

• Phylum-Porifera
• Class- Demospongia
• Order-Keratosa
• Genus-Euspongia

Comments:

1. 1.Euspongia is the common bath sponge.
2. 2.The sponge is massive and rounded in form, dark black in colour, provided with a number of oscula on the elevated portions of the body.
3. 3.It is a complex type of sponge .
4. 4.Skeleton composed of network of spongin fibers without spicules.
5. 5.The bath sponge of household use is prepared by squeezing and bleaching or dyeing of the sponge.
6. 6.The common bath sponge consists mainly of spongin fibers.
7. 7.It has the capacity of holding water.
8. 8.It is commonly used in offices,etc.,for wetting postal stamps and counting currency notes or papers,etc.

Source:

1. Practical Zoology Invertebrates by S.S.Lal. 2. A Manual of Practical Zoology Chordates by Dr. P.S. Verma.