Yes
Yes
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it filters out bacteria from the water
Sponges are mainly filter feeders, eating particles and plankton in water that enters their system
Many of the reef fishes feed on sponges for their diet.
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.