On 15 and 17 September 2008 two sightings of blue whales were recorded (with photographic confirmation of species identity) on the continental shelf slopes to the west of Ireland. Blue whale sightings within the Irish Exclusive Economic Zone (200 nm limit) are extremely rare with only three reported sightings since the closure of the Irish/Norwegian whaling stations in 1922, none of which were confirmed by photo-identification. These new records are considered to be of two separate animals due to the distances between sightings and fluking behaviour being exhibited by only one of the animals. Evidence suggesting that these animals were feeding was collected during both sightings, with northern krill thought to be the prey species. Photographs taken on 15 September allowed for photo-identification comparison with the North Atlantic blue whale catalogue, however no match was found. Together these sightings may indicate a previously unrecorded feeding area for blue whales in the north-east Atlantic.