The waters surrounding the Llyn Peninsula are home to a large population of sea mammals that thrive on the rich undersea life. In the summer, the warm currents bring dense shoals of Sand eels that form the staple diet for larger fish, such as the Mackerel, and the seabirds and the marine mammals of the area. In turn, the Mackerel falls prey to the larger marine mammals such as the Bottle-Nosed Dolphins.

Sea Life - The area is an important refuge for Grey Seals. They are larger and far more robust than their relatives, the Common Seal. Large breeding colonies are located at both the St. Tudwal's archipelago and Bardsey Island, with smaller, isolated groups living along the northern coast, such as small number found near Porth Dinllaen.
The Harbour Porpoise is regularly seen some way offshore, but usually only singly or in very small numbers. Usually seen off Porth Ceiriad and on the way to Bardsey Island, a few miles out from Hell's Mouth. The Harbour Porpoise unfortunately seems to be under some form of environmental pressure and is thought to be in decline worldwide.
More regular encounters are with Bottle-nosed Dolphins, although very occasionally seen are the Common and Risso's Dolphins to the west of Bardsey Island and in Bardsey Sound. Pods of Bottle-nosed Dolphins are often encountered on trips out of Abersoch bay.

St Tudwal's Islands - are a small archipelago of two islands lying south of Abersoch St Tudwal's Island West and St Tudwal's Island East plus the Carreg y Trai rocks or half tide rocks as they are also called.
On St Tudwals East are the remains of a monastic settlement and Priory.

The internet site for Abersoch. Your one stop shop and virtual guide for Abersoch and the Llyn Peninsula. Find out whats going on, where to go, events, local services, maps, beach guides and so much more.

Have fun exploring the site, find out more about our country and when you are ready to visit for real there's lots of help for planning and booking your trip, too.

The Llyn is a fisherman's paradise. In addition to sea angling, there are many freshwater lakes and rivers, For many-fishermen, variety is the spice of life. And if that is what you are looking for you will surely find the Llyn coast very much to your taste. Hard fighting, golden flanked pollack and multi-coloured wrasse can be caught from virtually every rock mark, along with rays, bullhuss, mackerel, dogfish, bass, mulletbream, gurnards, conger and many, many more. The beaches and estuaries will also produce bass, mullet and various types of flatfish.