Great White Shark Devouring Seal at Beach, First Sighting of Season

The state of Massachusetts is going to need a bigger boat after hearing about this ... a great white has been spotted for the first time this season, and it's having a big meal right next to the beach.

Beachgoers saw quite the scene Sunday at a beach in Nantucket as a huge shark took down one of the nearby seals ... the clip shows the water quickly turning from blue to red as it takes bite after bite.

With this being the first sighting of the season, the Atlantic White Shark Conservancy is urging people to play it safe while catching rays -- things like staying close to the shore and avoiding areas with a lot of seals or schools of fish.

They also recommend people in the water keep their splashing to a minimum -- what a bummer.

Of course, this story seems too familiar ... great white spotted near a beach on a holiday weekend? Reminds anyone of that Jaw-dropping flick? Not to mention Spielberg filming his blockbuster in Martha's Vineyard -- on an island just a few hours away from this new sighting.