Larne Lough is a sea lough on the east coast of Northern Ireland. It is enclosed to the east by the peninsula of Island Magee. Much of the estuary is shallow, having become extensively infilled with sediments of fine muddy sand, and at low water the largest areas of intertidal flats are exposed in the south of the estuary. The northern parts of the estuary are wider and relatively deep, especially at the mouth where dredging is regularly carried out. In the upper reaches of the estuary at Ballycarry, there is an area of saltmarsh. As the effects of salinity and differing tidal inundation are not greatly felt in the upper parts of Larne Lough, the saltmarsh zonation patterns are not distinct. The vegetation is dominated by mid-upper saltmarsh communities and aPhragmitesaustralis reedbed, with some saltmarsh pans. The lough is of importance as a breeding and feeding area for a number of tern species as well as being a wintering site for the Canada/Ireland population of Light-bellied Brent Goose Branta bernicla hrota.