Rudd and Three-spined Stickleback are regarded as being native to the Island, however a wide variety of other specimens has gradually been introduced.
Cwm Reservoir offers Roach, Tench, Rudd, Perch and Bream and Ty Hen offers Tench and Carp in Common, Mirror and Ghost varieties. At the Llyn Bryntirion working farm, you can fish for Carp and Perch in any of three ponds, covering three acres of water and a wide selection of catch is available at Llyn Dewi (Carp, Roach and Rudd); Llyn Maelog (Bream, Rudd, Roach, Perch and Eel); Llyn y Gors (Carp, Catfish, Rudd, Tench, Roach, Perch, Golden Orfe and Bream) and at Tyddyn Sargent (Carp, Roach, Rudd, Tench and Bream).