Fish fences from Aberlleiniog
The fish fences of Aberlleiniog ( English Aberlleiniog Fish Weir I + II ) are east of Llangoed, in Bangor in the north-east of the 25 km-long Menai Strait off the island of Anglesey in Powys in Wales .
A fish fence or fish weir is usually characterized by a wattle fence with a series of stakes, often with nets, which form a funnel-shaped enclosure within a body of water and are used to catch or hold fish.
In Britain , the traditional form was one or more rock weirs in tidal gullies or on a beach, with a gap that could be blocked by wattle fences or netting. Examples are in Menaistraße (Beaumaris Fish Trap, Coed Mor Fish Weir, Gorad Ddu Fish Weir, Gorad Friars Bach Fish Weir, Trecastell Fish Weir and Ynys Gorad Goch). Most of these fish weirs were identified by aerial photographs , although little can be seen on the ground.
The well-preserved remains of the Aberlleiniog fish weir date from the late Middle Ages . They are straight and defined by broad stone walls. The approximately 300 m long, 8.0 m wide and 0.2 m high wall of the inner wall with an attached row of stones up to 0.4 m high runs at 90 degrees to the bank. The outer wall runs at right angles and is about 220 m long.
The monument is of national importance for its potential to improve knowledge of medieval and post-medieval maritime practice. In connection with the nearby weirs at Gorad Friars Bach and Trecastell, the location has a significant group value.
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Coordinates: 53 ° 17 '27.1 " N , 4 ° 4' 9.6" W.