The top picture is a common dolphin. Can't tell for the others. The other things you are likely to see up there are minke whales (a lot bigger with a dolphin-like fin but set nearer the tail).
in that case they are all Dolphins. Had about 4 or 5 visits in 2days one group of over 20 put on an amazing display.And stayed with me for about 20 minutes.All seen closer to Wales than Ireland.