The New England Aquarium spotted three rare “deep-diving” whales off the coast of Cape Cod.

In mid-October, the Anderson Cabot Center for Ocean Life aerial survey team spotted three True’s beaked whales over the Northeast Canyons and Seamounts Marine National Monument, which is about 130 miles off of Cape Cod , the aquarium announced Oct. 30 on Facebook.

“These deep-diving whales are rarely seen at the surface and were a delight to see from the sky,” the post said.

True’s beaked whales rarely surface because of their ability to hold their breath for hours at a time, an aquarium researcher told WBZ-TV .

The whales also maintain a low profile at the surface and have an “inconspicuous blow,” making them even harder to spot, according to the National Oceanic and Atmospheric Adminis

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