Bath sponges – Marine animals without backbones – Te Ara

The natural sponges we use in our baths are actually animal skeletons. Bath sponges consist of a highly porous network of fibres made from a collagen protein called spongin. The skeletons are obtained by cutting the growing sponges and soaking the cut portions in water until the flesh rots away.

Spongin of the bath sponges origin (A) has been recently recognized as

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