Sponges (Phylum Porifera)
There are 5,000-10,000 sponge species, found from the intertidal zone to the deepest ocean trenches. They are among the oldest and simplest creatures, evolving 650 million years ago.
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Sponges (Phylum Porifera) There are 5,000-10,000 sponge species, found from the intertidal zone to the deepest ocean trenches. They are among the oldest and simplest creatures, evolving 650 million years ago. |
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