Sponge images (phylum Porifera) - stock photos & facts of this ancient form of animals

Scientific classification | Kingdom: Animalia > Phylum: Porifera

Sponges come in many different types of colors, shapes and sizes, and estimates say there are more than 5,000 species of sponges. Sponges are invertebrates - that means they do not have a backbone. Over 95% of the animals in the world are invertebrates. Sponges can found in both freshwater and saltwater....
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