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*The photograph is from network Freshwater Sponge, Spongilla spicules, Spongilla, Spicules Freshwater Sponge, Spongilla spicules, Spongilla, Spicules Freshwater Sponge, Spongilla spicules, Spongilla, Spicules， Spongilla, Spicules
Sponges are the most primitive creatures that have lived on our planet for 200 million years. There are more than 10000 kinds of sponges in the world, most of which live in the ocean, accounting for 1 / 15 of the total number of marine organisms. Freshwater Sponge, Spongilla spicules, Spongilla, Spicules Freshwater Sponge, Spongilla spicules, Spongilla, Spicules Freshwater Sponge
However, not all sponges live in the sea. There are about 20 kinds of sponges living in fresh water. They usually live in clean lakes and slow streams. Freshwater sponges are beautiful but rare. They are symbolic creatures of clean water. Freshwater Sponge, Spongilla spicules, Spongilla, Spicules Freshwater Sponge, Spongilla spicules, Spongilla, Spicules Freshwater Sponge , Spongilla spicules