Atlantis Banquets & Events can accommodate your wedding for 50 to 340 guests in one of nine diverse locations including the modern and beautiful Sea Star Ballroom with sweeping views of the Treasure Cove Resort Marina and Peconic River.  The Coliseum Room is another perfect venue located within the Long Island Aquarium, which houses our most captivating and colorful aquatic habitats. Your ceremony can take place outside, in the Riverside Pavilion just on the banks of the river, or in the Grand Foyer of the Sea Star Ballroom, with beautiful marble features and a stunning Chihuly inspired glass chandelier.  An event like no other, only Atlantis Banquets & Events can bring the element of nature to your wedding with photo sessions including our penguins, sea lions, sharks or within our indoor and always tropical Butterfly Garden.  

Wedding Packages

Your once-in-a-lifetime celebration deserves a one-of-a-kind setting. From our waterfront location on the Peconic River to our spectacular aquatic displays, Atlantis Banquets & Events offers wedding packages to fit your style, vision and budget! We understand how important your wedding day is, and we will make your experience extraordinary and unlike any other. That’s why we focus on only one wedding at a time. You and your guests deserve nothing less.

Our experienced staff will assist you with planning the perfect wedding and we will suggest creative ideas to plan a wedding reception that is truly original and memorable!

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Wedding Promotions

Escape the ordinary and plan your wedding here, in our breathtaking Sea Star Ballroom, located directly on the Peconic River. From the moment you and your guests enter our unique venue your event begins with white glove service, professionally attired wait staff, a personal hostess, and more.

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Atlantis Banquets & Events catering team will help you plan the perfect wedding menu. We will suggest popular food items and pairings, and we will make accommodations for your guest’s food allergies so that everyone can enjoy your wedding reception!

We feature gourmet culinary options created by our classically trained Chef, making the most of seasonal flavors and using the freshest, sustainable products, ensuring your guests will enjoy every bite. With white glove service, professionally attired wait staff, a personal hostess and five hours open bar, our meticulous team caters to your every need.

You can choose from: butler-passed hors d’oeuvres, cocktail party or a buffet or seated dinner reception. Whichever option best suits your affair, our chefs will help create a memorable experience for you and your guests.

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Unique Experiences

Having an event with Atlantis Banquets & Events means you can capture photos in two unique environments, along the pristine waterfront and at the Long Island Aquarium. Whether posing along the Peconic River or before our most popular displays like our 120,000-gallon shark habitat, we guarantee photos you won’t get at any other venue.


Proposal Packages

Let us help you pop the question, aquarium-style, with a penguin, sea lion, or even a shark!


Build Your Dream Wedding

Let us help you build the wedding of your dreams! Answer these questions and get a custom quote!

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Room Blocks

Room blocks are available for all your special events. Take the elevator home and enjoy our luxurious, waterfront accommodations at the Hyatt Place Long Island/East End adjacent to the Sea Star Ballroom, or modern, boutique suites at The Preston House & Hotel just across the street. Our Waterfront Suite is another lavish option overlooking the Treasure Cove Resort Marina.

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I really don’t know where to begin. Well, that first day we met, I wasn’t sure if it was safe to take you seriously! Your matter of fact, eager to please and easygoing demeanor was hard to accept, let alone believe. We had visited a few other wedding reception establishments, including the aquarium in Norwalk, CT., but we were not impressed with the places or the people. The places we visited seemed to be just a space with four walls, and the people we saw seemed to just be doing their job.

So thank you for being such wonderful new member of our family. We also want to thank your great staff, who did a super job for all our guests and us. Danny it was an extreme pleasure to greet you into our family. We hope to become members so Jacob and the rest of the gang can come and visit you and Atlantis many, many times. God bless you and we hope to see you soon.

William, Cheshire, CT

We wanted to thank you for making every part of our wedding so perfect. From planning, to the actual day, you were always there to be helpful, friendly and supportive. Your staff showed us the same wonderful qualities and made our wedding at Atlantis very memorable. The effort you and your staff put into our wedding will forever be appreciated.

Thank you so much for everything!

Every last detail was taken care of and we cherish every moment of our evening. We had so many guests tell us how impressed they were with the transformation of the aquarium into a setting for a unique and beautiful wedding!

Again, I thank you, your staff, and all the marine life that provided such a beautiful background!

Julie and John, New York