The following is a list of some of the known fish species that inhabit the water systems in the Burren National Park.
| Common Name | Irish Name | Scientific Name |
| European Eel | Eascann | Anguilla anguilla |
| Perch | Péirse | Perca fluviatilis |
| Pike | Gailliasc | Esox lucius |
| Rudd | Ruán | Scardinius erythrophthalmus |
| Salmon | Bradán | Salmo salar |
| Tench | Cúramán | Tinca tinca |
| Three-spined Stickleback | Garmachán | Gasterosteus aculeatus |
Eels and Three-spined Stickle Backs are known to occur in some of the Turloughs, Perch are known to exist in Lough Gealáin, Pike in Lough Bunny and Salmon, Tench and Pike in the Ballyeighter Lough system.
Fishing is NOT permitted in the lakes, turloughs and water systems in the Burren National Park.