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Glass Sponge Anchoring Fiber... | by Sea Moon
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Glass Sponge Anchoring Fiber...

At the bottom of the Venus' Flower Basket glass sponge there are many thin silica strands that anchor the sponge to the sea floor. There are some other fine strands higher up on the sponge, but only the ones down at the bottom have barbs such as these for snagging things.

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Taken on November 4, 2011