Last updated on April 25, 2014 at 1:22 EDT
A sea sponge extracts water
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A sea sponge extracts water.

May 5, 2010
A sea sponge extracts water. Though often mistaken for plants, sea sponges are in fact dynamic, industrious animals that pump thousands of liters of water through their bodies in a single day.

This image was taken as part of a project supported by National Science Foundation grant ESI 98-14957. (Year of image: 2002)