Dr Sarah Perry yw Rheolwr Prosiect Moroedd Byw Ymddiriedolaeth Bywyd Gwyllt De a Gorllewin Cymru. Yn 2012, roedd Sarah wrthi'n gwneud arolwg ar y cwch Arolwg Dolffiniaid pan gafodd Llwynog Môr ei weld.
Ar y pryd fe wnaeth Sarah rannu'r hyn a welodd ar dudalen Facebook Canolfan Bywyd Morol Bae Ceredigion. Daw'r testun isod o'r dudalen honno:

"So, Wednesdays (8th August 2012) All Day Survey was what you could say mighty successful. Filled with numerous sightings of Atlantic grey seals and harbour porpoises and our favourites the bottlenose dolphins. we also had a myriad of bird species including storm petrels, scoter, puffin, gannets, manx shearwaters and lots more sighted. But to top it off we saw a 15-20ft Thresher shark breach right out of the water (photographed by one of our passengers) as well as common dolphins (>100) in Cardigan Bay. Oh my gosh, can it get better than that?”

You can learn more about Cardigan Bay Marine Wildlife Centre here - https://www.welshwildlife.org/visitor-centres/cardigan-bay-marine-wildl….