Thirty miles west of Caernarfon in Gwynedd a pod of 30 common dolphin was also spotted.

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Glass mosaic tiles will then be applied to create the images of an Atlantic white-sided dolphin, a short-beaked common dolphin and fin whale.

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After being stuck in murky low-tide waters for most of the day, the Common Dolphin passed away Friday evening, according to Joanne Biegert of the Riverhead Foundation.

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Although dolphin sightings are traditionally more common in warmer months, Mr Benson says Sea Trust has been spotting them all year round since about 2009.

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The Guiana dolphin (Sotalia guianensis) lives around the east coast of South America, and resembles the much more common bottlenose variety.

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