Bath sponges – Marine animals without backbones – Te Ara Encyclopedia of New Zealand

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.

New species of 'sneezing' sea sponge discovered in Tauranga

For the love of sponges

Magical mysteries of marine sponges - ScienceDirect

Marine animals without backbones – Te Ara Encyclopedia of New Zealand

Sea sponges may seem like simple creatures, but…

Sponges - The Australian Museum

Marine animals without backbones – Te Ara Encyclopedia of New Zealand

For the love of sponges

Marine animals without backbones – Te Ara Encyclopedia of New Zealand

Magical mysteries of marine sponges - ScienceDirect

Sponges