A beautiful, but unusual sighting of killer whales in Monterey Bay has officials puzzled.
Marine biologist Nancy Black says she spotted about 30 orcas swimming in the bay.
Black says the orcas were part of 11 families.
She called it the best sighting she's experienced in her 35 years of researching killer whales.
Black is not sure why so many orcas were gathered in one spot.
She said there has been an uptick in killer whale sightings in the area over the past couple of weeks.