"This is incredibly exciting. As far we know, there are no confirmed live sightings at sea of this species in New Zealand, only a handful of stranding records," the collective said on its Facebook page.
"Beaked whales are mysterious creatures, due to their shyness of boats, offshore range and deep-diving habits, spending long periods of time under water. Most of what we know about them is from beach strandings, and some species are hardly ever seen or photographed alive.
"We were lucky to snap a few photos, including of the beak of one of them, which helps to identify the species. As far we know there are no confirmed live sightings at sea of this species in New Zealand, only a handful of stranding records.
Project Jonah said this was the first confirmed at-sea sighting of the species not only in New Zealand but possibly the Southern Hemisphere.