Facts About Sponges (Porifera)

Sponges are a group of simple aquatic invertebrates that include glass sponges, demisponges, and calcareous sponges. Their body wall has three layers.

Porifera: Phylum Of The Indestructible Sponges

Interesting Facts About Invertebrates

Segmented Worms and Their Species

Facts About Phylum Chordata - The Vertebrates

stocks/interesting-facts

Bath Sponge (Spongia officinalis) - Atlantis Gozo

أنواع اللافقاريات - موضوع

What is a sponge?

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Interesting Facts About Invertebrates

Meet the Terrestrial Snail