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Grass Carp, Monmouthshire-Brecon Canal, Pontnewydd, Cwmbran 9 July 2015
A grass carp (Ctenopharyngodon idella) in a lock at Pontnewydd. Herbivorous, they have been introduced into countries around the world, in some waters, for weed control. When I was a child, the only fish seen were three spined sticklebacks, several species have been introduced by the local angling club.