Oddi wrth Wicipedia, y gwyddoniadur rhydd.
Gall y ffeil hon gael ei defnyddio gan nifer o brosiectau eraill.
Sea urchin
Echinometra mathaei, live on sand background.
- Image ID: reef0272, The Coral Kingdom Collection
- Location: University of Hawaii Institute of Marine Biology
- Credit: Photo Collection of Dr. James P. McVey, NOAA Sea Grant Program
Photo by the US National Oceanic and Atmospheric Administration
Source: Gimp Savvy or from NOAA: http://www.photolib.noaa.gov/reef/reef0272.htm
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