A cuttlefish is a type of mollusk, a Cephalopod, which has a highly developed central nervous system. Similar to octopuses and squids they arguably among the smartest invertebrates with the largest brain-to-body size ratio of all invertebrates. Also, they have an internal shell called a cuttlebone, which is porous and allows the animal to maintain buoyancy. They have a typical life expectancy of one to two years. However, there are over 120 different species of Cuttlefish in the wild.

Cuttlefish are remarkable for their ability to color change at will, using a set of specialized, pigmented skin cells and nerve cells, which interact to expand and contract, exposing various pigments as needed. This color change is useful for camouflage, communication between each other, and as a warning to predators.

Discus Fish

The discus fish are some of the most beautiful, vibrant, and colorful freshwater fish out there. Though there are only two or three species in nature, there are around 100 different color varieties that have bred in the pet trade by breeding different color morphs and patterns and selecting for various desired traits.

Actually a type of Cichlid, the Discus Fish are so-called for their flattened body shape. They can be found throughout the Amazon River basin in heavily wooded areas of the river.

Long Island Aquarium’s Discus Exhibit showcases a diverse group of discus varieties, which demonstrates the beauty and rainbow of color that these fish sport!

Moray Eels

Moray Eels are a type of fish with dorsal and anal fins fused to the caudal fin, forming a single ribbon along the length of the fish.  There are over 800 known species of eels and more than 100 species of moray eel, including zebra morays (Gymnomuraena zebra), snowflake morays (Echidna nebulosa), and tessalata morays (Gymnothorax favagineus). Moray eels are not the vicious, deadly animals that many think they are. Most would rather hide in their burrows than attack a human and there is little evidence that they are venomous. Their body is actually brown but appear green due to a yellow mucus that covers their whole body!

Shark Dive

Due to the nature of this adventure and the safety of our dive team, all divers MUST present a negative Covid 19 test result to us 48 hours prior to the dive.  You can email the results to us HERE. Vaccinated participants must show proof of vaccine.

Immerse yourself in the adventure of a lifetime! Our Shark Dive puts you inside a cage – right in the middle of circling sharks and an array of fish that cannot be found together anywhere on Earth.

An extreme adventure like no other, Shark Dive is an experience that puts you nose-to-nose with some of the ocean’s top predators inside our 120,000-gallon Lost City of Atlantis Shark Exhibit. No diving certification is necessary, and a trained Shark Dive Instructor accompanies all participants (must be 12 or older; ages 12-17 must be accompanied by parent/guardian).

Please note that all participants must sign and return a Liability Waiver prior to their dive.

Shark Dive participants are provided with everything necessary for their dive, including wetsuit, scuba gear, and an underwater mask that allows normal breathing and underwater communications.

Each Shark Dive adventure consists of an educational program about sharks, including a guided tour of their habitats, a lesson and safety briefing, and the dive itself.

Also included are:

There’s no better – or safer – way to experience the captivating allure of sharks than with our Shark Dive.

Friday-Sunday at 11:00am


Members: $175.00 plus tax (Aquarium Admission is included with a membership)
Non-Members: $195.00 (Aquarium Admission MUST be purchased with Adventure) plus tax

This adventure must be booked 72 hours in advance.  There is a 72-hour cancellation policy, within 72 hours, no refund – Aquarium credit only. Reservations required by calling 631.208.9200, ext. 426, or in person.

Liability Waiver

If you plan to participate in Shark Dive, you MUST COMPLETE and SIGN a Liability Waiver PRIOR to the day of your dive. Click the BUY NOW button to access the waiver. 
Every diver MUST complete a liability waiver – there are no exceptions. If you answer YES to any question on the liability waiver you will NOT be permitted to dive without a doctor’s note on the medical release that we can supply.

If you have an existing medical condition, you must also sign a Medical Release that we will email to you after you make your reservation. Please complete and 
sign your portion, and have your physician do the same. You must bring this completed form with you on the day of your dive.

Buy Now

If you have any questions or would like to speak with a representative about a Shark Dive, please call 631.208.9200, ext. 426.


Tidal Marsh

This 3,000-gallon saltwater tank is home to about 15 different species of animal which were collected locally by Aquarium biologists. All of these animals use tidal marshes for part or all of their life for refuge from predators and for sources of food.

Schooling Fish

Swimming in schools helps fish confuse predators and spend their energy most efficiently. About half of all fish school for part of their lives, and a quarter do so throughout their lifetimes. The Schooling Fish exhibit at the Long Island Aquarium features the common Pacific silver moonfish (Monodactylus argenteus).

Puffer Fish

Puffer fish create an imposing appearance by pumping air into their expandable stomach. They can be as dangerous to other fish as they look, with small teeth that form powerful cutting and crushing plates. Most puffers also produce a poison, concentrated on their skin and other organs.

The Long Island Aquarium Puffer Fish exhibit showcases the cowfish, boxfish, and porcupinefish.



puffers 1

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Poseidon’s Treasure Room

Poseidon’s Treasure Room houses several periodically changing freshwater and saltwater displays. It provides a fascinating view of unusual marine creatures and life, including:

  • Sharks and Egg Cases – Developing shark embryos in their egg cases let you witness the miracle of life as it unfolds.
  • Asian Hillstream Fishes – Many of these fish have special adaptations to help them not get swept away from swift currents.
  • African Lungfish (Protopterus annectens) – An air-breathing fish that could actually drown if no air were left at the top of its display tank.
  • Mexican Blind Cave Fish (Astyanax fasciatus mexicanus) – Fish whose eyes become covered as young fish mature.
  • Filter Feeding – A display that illustrates how sponges and other creatures sieve plankton by creating water currents.
  • Cerianthus anemone, tube anemone – Creatures that look like living lava lamps!
  • Lionfish (Pterois volitans) – Fish that have been carried to Long Island from the Carolinas by the Gulf Stream, and caught as part of a scientific capture program.
  • Frogfish – Short and stocky, these fish are often covered in bodily extensions to make them blend in with the ocean floor.
  • Tropical Lagoon – A display that illustrates how tropical lagoons provide protected nursing grounds for reef fishes.

Our Treasure Room gives us a way to focus on some of the smaller, more delicate fish that might get lost in our larger exhibits. 


The piranha – which means “toothed fish” in the language of a native Amazon tribe – has an exaggerated reputation as an aggressive killer. Not so!

While they have been known to attack humans and some of these attacks have resulted in fatality, these incidents are rather uncommon and usually occur during the dry season when schools of them are desperate for food. The majority of piranha species are omnivores, feeding on nuts and berries at various points in their life and feeding on small animals when vegetative food sources are scarce.

About 20 species of piranha inhabit the Amazon River basin. The Long Island Aquarium’s Exhibit is home to the red-bellied piranhas (Pygocentrus nattereri) – the most widely distributed species in the Amazon and Orinoco regions. This species is the one most associated with the frightening myths.

pirhanha exhibit

Lost City of Atlantis Shark Exhibit

Poseidon’s 12-foot trident, pillars, and other remnants of the Lost City of Atlantis Exhibit create a ghostly environment for the inhabitants of the 120,000-gallon Lost City of Atlantis Shark Exhibit.

Menacing-looking sand tiger sharks (Carcharias taurus), bottom-dwelling nurse sharks (Ginglymostoma cirratum), and a gaping moray eel (Gymnothorax funebris) join a massive Queensland grouper (Epinephelus lanceolatus) and other fish in an exhibit that forms the centerpiece of the Long Island Aquarium.

Despite their fearsome appearance, the sharks in this exhibit, like most shark species, are not aggressive towards humans unless they are provoked. Learn this firsthand from within the shark tank! Make your reservations for a Shark Dive today and get a thrilling look at these beautiful animals from a sharks-eye view! After you dive amongst them, you can feed them by embarking on the Shark Keeper Adventure!

Jellyfish Exhibit

With more than 200 species found worldwide, jellyfish, or sea jellies, are one of the world’s most common sea creatures. They range in size from just under an inch to giants with tentacles measuring over 100 feet.

Sea jellies consist of a gelatinous bell and trailing tentacles. They lack a centralized nervous system, heart, bones, and gills. They do have a simple nervous system, sometimes referred to as a “nerve net,” and their body walls are thin enough to allow oxygen to pass directly from the water to their internal organs.

Though they may look rather harmless, jellyfish have special defensive cells, called nematocysts. Used only once and then replaced, nematocysts help them capture prey and defend themselves.

Giant Pacific Octopus

The Giant Pacific Octopus (Enteroctopus dofleini) lives in the waters off North America’s northwestern Pacific coast. Though this Cephalopod may seem armed, it is harmless! Once considered a man-killer, the Giant Pacific Octopus actually prefers flight to fight. Shy yet highly intelligent, it hides by day and combs the seafloor for crabs and other shellfish by night.

To ward off predators, blend into its surroundings, or attract a mate, the Giant Pacific Octopus can change its color and texture almost instantly.