Harbour porpoises are the smallest cetaceans found in Scottish waters. They are also the most abundant cetacean in inshore waters, being found all around our coastline. They tend to be alone or in small groups, although they may form larger groups in areas where there is an abundant food source.
If you are patient and watch carefully from a vantage point, such as a headland, you may catch a glimpse of a harbour porpoise, although in rough water it can be difficult to pick out their small dorsal fins. They are less likely to display than other cetaceans and tend to move quickly away from approaching boats.