"All about sponges" by Dr Thierry Perez, researcher at the national centre for scientific research, Marseille

Sponges have been known and used since antiquity.

Toilet sponges only represent a very small proportion of the diverse species currently known in the seas of the world. Sponges may also be found in lakes and rivers.

Today, we know of more than 8000 species of sponges throughout the world (Axinella polypoides, Axinella vaceleti, Aplysina aerophoba, Baikalospongia...), with the Mediterranean accounting for approximately 10%. Sponges may be bulky, spherical or tree-like, or appear as incrustations. They can vary in thickness and are found in all colours, with a single species being able to vary in shape and colour depending on its habitat. Sponges are described as 'PLASTIC' – this means that their appearance may vary greatly, depending in particular on their environment (light levels, hydrodynamics, etc.)
For more information, visit the: World Porifera Database

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