There are also nine river Special Areas of Conservation (SACs) in Wales – the Cleddau, Eden, Gwyrfai, Teifi, Tywi, Glaslyn, Dee, Usk and Wye.
Hefyd, mae naw Ardal Cadwraeth Arbennig (ACA) afon yng Nghymru – Cleddau, Eden, Gwyrfai, Teifi, Tywi, Glaslyn, Dyfrdwy, Wysg a Gwy.