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| Invertebrates :: sponges
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Classification
Though plant-like in appearance, sponges are actually one of the most primitive animals in the sea. They belong to a group called porifera. Most of us are familiar with the dried colorless varieties that populate the kitchens and bathrooms of the world. |
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Sponges: The Weird Wonders of the Seas!
Although they may look plant-like, sponges are the simplest of multi-cellular animals. A sponge is a bottom-dwelling creature which attaches itself to something solid in a place where it can, hopefully, receive enough food to grow. |
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The simple animals
There are approximately 15,000 different species of sponges in the world, 150 of which occur in freshwater. Only about seventeen are of commercial value. |
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Was The Humble Sponge Earth
Fish swim. Birds fly. Humans walk, talk, and think. Animals exhibit such an array of diversity in shape and behavior that it's hard to imagine how a single organism could have given rise to them all. |
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