.

Simply so, how do sponges survive?

Sponges live at every depth in both marine and fresh water environments, and under a variety of conditions. They are "sessile" animals (they don't move around) and they live by pumping large volumes of water through their bodies and filtering out tiny organisms and organic particles as food.

Also, how do sponges eat? Diet: Sponges are filter feeders. Most sponges eat tiny, floating organic particles and plankton that they filter from the water the flows through their body. Food is collected in specialized cells called choanocytes and brought to other cells by amoebocytes.

Regarding this, why do sponges have strong powers of regeneration?

Sponges have strong powers of regeneration, probably due to the interchangeability of their cells, and to their lack of special tissues. Wounded sponges can regenerate tissue and skeleton to replace the wounded part. These same abilities enable some species to reproduce asexually by fragmenting.

How did sponges evolve?

There are about 5000 to 10,000 of species of Porifera that are known today. Out of them only 150 species live in fresh water. The rest of the sponges dwell in salt-water. Sponges are very primitive creatures that evolved around 500 million years ago (1).