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Dwgoniaid
Golwg ar y dwgoniaid, mamaliaid mawr morol sy'n treulio eu holl fywyd yn y m么r. A look at the Dugong, a large mammal that spends all its time in the ocean.
Darllediad diwethaf
Mer 16 Medi 2015
17:35
Darllediad
- Mer 16 Medi 2015 17:35