That Flounder guy
Some enemies are algae and barnacles.
Purple tube sponges have few natural enemies due to their chemical defenses and habitat preferences. However, they may be consumed by some predators, such as sea urchins, certain nudibranchs, and some fish species. Overcrowding and competition for space with other filter feeders can also pose a threat to purple tube sponges.
Ostia
No, sea sponges are not decomposers. Sponges are filter feeders.
no sponges are not unicellular.
no sponges do not have bones
No, sponges are not parasitic.
Sea sponges can be preyed upon by certain animals like sea slugs, sea stars, and some species of fish. They can also be damaged by pollution and habitat destruction caused by human activities.
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.