Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Photo: A pair of sand disc bryozoans (Discoporella doma) photographed at Gulf Specimen Marine Lab and Aquarium.

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A pair of sand disc bryozoans (Discoporella doma) photographed at Gulf Specimen Marine Lab and Aquarium.

This animal provides shelter for many other organisms. Inside is calcareus tube worm (Hydroides crucigera) and encrusting sand tube worm (Sabellaria sp.)

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