Five facts about sponges Early fossil records show that sponges lived on Earth about 600 million years ago. It's a very long time for animals without a complex nervous system, digestive system, or circulatory system! Some deep-sea sponges can live up to more than 200 years ago. The sponge is a master filter.
What is unique about sponges?
All sponges are aquatic, mostly marine, and can be found from the deepest oceans to the subterrestrial environment (which can survive very well). They are the most primitive of the multicellular animals. Their bodies lack true tissue, but each is composed of many different cell types with special functions.
What are the four characteristics of sponges?
General characteristics of sponges: Habitat: Advertising :. Body shape: Those bodies are porous, that is, they have pores. .. Symmetry: Most sponges are asymmetric. .. Germ :. Organizational level :. Body wall :. Canal system :. Skeleton (figure sponge: characters and classification
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