Passengers on a charter boat off the coast of Massachusetts got the show of a lifetime, capturing photos and video of two great white sharks chowing down on an enormous whale carcass. Video of the amazing encounter is embedded at the bottom of this post.

A minke whale carcass was spotted by a fisherman recently floating about seven miles from Plymouth Harbor, prompting experts with the New England Aquarium to relocate the whale further to the northeast. Just a day later, a SeaSalt Charters boat spotted sharks eating the carcass, a very rare sight.

“This is the first time I’ve ever seen anything close to that activity with a great white,” Chad Avellar, who works for the company, told WBZ NewsRadio 1030’s Doug Cope. “Every time we do this we think ‘Maybe today’s the day.’ Today was the day.”