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A very robust dolphin with a small beak and tall, curved dorsal fin. They have a complex colouration pattern with a white beak, dark grey along the back and white underneath with a diagnostic saddle patch behind the dorsal fin.
Breaching sometimes occurs and they may be seen associating with other species. They bow-ride vessels infrequently.
Little is known about this species in Irish waters but as expected of a cold water shelf species, most sighting in Irish waters are from the Northwest region where they appear to be most abundant in offshore waters off counties Mayo and Donegal.