The Afon Glaslyn flows into the north of the bay and Saint Tudwal's Islands lie at the western end of the bay. Pwllheli, the main market town of the Llŷn Peninsula, together with the historic towns of Harlech and Criccieth, and Abersoch, a popular location for water sports, all lie on its shores.
- Overview of its marine biology
- for Tremadog Bay
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