I don't think these are particularly rare animals, but a few days ago is the first time I've come across a pod of Risso's dolphins. They were body-surfing in the swells, clearly having a good time.
Risso's dolphin (Grampus griseus)
Managed to get a few snapshots of these odd-looking cetaceans. They sort of look as if some over-ambitious person gave them a thorough scrubbing over with steel wool!