Lough Hyne marine reserve is a sea inlet, of area c. 60 ha, on the south-west Irish coast. Conditions vary from the exposed outer harbour of Barloge Creek to a sheltered marine basin, with depths to 47 m. A shallow, narrow connection, the Rapids, between the two parts causes a reduced tidal range within the marine basin. The status of 72 fish species is given, 38 of them being recorded for the first time from this locality. Eleven goby species are present, including well established but isolated populations of Gobius cruentatus and G. couchi. The listing comprises museum material, previous records and direct observations from 1976 to 1985 inclusive. This reserve is recognized by the Council of Europe as part of an international biogenetic network of reserves.