annelida
an invertebrate because they have no backbone.
fourty-seven
poriffera ;its 'porifera' according to the correct sites!
One of the names commonly used for sponges, is their phylum name, "porifera".
No, sea sponges are not decomposers. Sponges are filter feeders.
no sponges are not unicellular.
No, sponges are not parasitic.
no sponges do not have bones
Sponges are asymmetrical, although a few species have nearly radial symmetry.
To answer your question no sponges do not hibernate
Yes sponges have organs.
No. Sponges are animals, which are heterotrophic.