It's not something you see often in Cape Cod waters, but one group of fisherman were treated to an Orca sighting this weekend. 

The crew aboard Got Stryper Charters and Baits shot some super cool video of an Orca swimming east of Chatham on Sunday. And lucky for the rest of us, they shared it.

And if that wasn't cool enough, it was swimming around with some dolphin friends!

Orcas are actually members of the dolphin family, though much larger and much more dangerous believe it or not.

Also known as the killer whale, Orcas have teeth and have even been known to eat dolphins.

I'm assuming this one didn't, because that would have been an entirely different video.

This one certainly makes it seem as if the dolphins and whales are getting along and enjoying a swim on a sunny day together.

Of course the dolphins have been spotted in several Cape Cod spots so far this season, including swimming right up the canal.

The Orca is a new sighting though and an extremely rare one according to the Atlantic White Shark Conservancy. They shared this exciting video as well, commenting that the Orca swam in the fishing boat's wake for nearly 20 minutes and even had a young shark swimming in his crew.