Where Is the Worlds Largest Aquarium – Top Giant Tanks Revealed

The answer to where is the worlds largest aquarium is Chimelong Ocean Kingdom in Hengqin, China. It holds the Guinness World Record with a total volume of 12.87 million gallons. This massive facility houses majestic species like whale sharks in a single tank containing nearly 6 million gallons of salt water.

Ever looked at your home tank and wondered what it would be like to scale everything up by a million? We all strive to provide the best environment for our fish, but the engineering behind the world’s largest exhibits is truly mind-blowing.

I promise that by the end of this guide, you’ll not only know exactly where these behemoths are located but also understand the high-tech secrets they use to keep their water pristine. We’ll preview the top record-holders and see how their massive Life Support Systems compare to our setups at home.

Whether you are a beginner or an intermediate keeper, there is so much we can learn from these professional installations. Let’s dive into the world of mega-aquariums and see what makes them tick!

Where Is the Worlds Largest Aquarium Exactly?

When people ask where is the worlds largest aquarium, the answer officially points to the Chimelong Ocean Kingdom in Zhuhai, China. Opened in 2014, it took the title from the Georgia Aquarium and hasn’t let go since.

This facility isn’t just a single tank; it is a massive complex consisting of seven different aquatic-themed areas. Each area represents a different part of the ocean, housing everything from polar bears to tropical corals.

The centerpiece is the Whale Shark Exhibit. It holds the record for the largest individual aquarium tank in the world, with a volume of 5.9 million gallons. This tank is where you will find the massive Rhincodon typus (Whale shark) gliding alongside manta rays and thousands of schooling fish.

Breaking Down the Records

Chimelong actually holds five different Guinness World Records. These include the largest underwater viewing dome, the largest aquarium window, and, of course, the largest total water volume.
For us hobbyists, it’s hard to wrap our heads around those numbers. If you’ve ever had to calculate tank weight for a 75-gallon setup, imagine the structural engineering required for millions of gallons!

The Location and Visitor Experience

Located on Hengqin Island, the park is designed to be an immersive experience. It uses massive acrylic panels—some of the thickest ever produced—to hold back the immense pressure of the water while providing crystal-clear views for visitors.

The Engineering Marvel: Life Support Systems (LSS)

You might think your canister filter is a lot of work, but the Life Support Systems (LSS) at these giant aquariums are industrial-grade wonders. To keep 12 million gallons of water safe, they use a combination of mechanical, biological, and chemical filtration.

The goal is the same as our home tanks: maintaining Dissolved Oxygen Saturation and keeping ammonia at zero. However, the scale requires Industrial Protein Skimmers that are several stories tall.

Ozone Fractionation and Water Clarity

One of the secrets to the incredible clarity in these massive tanks is Ozone Fractionation. Ozone is a powerful oxidizer that breaks down organic molecules that make the water look yellow or cloudy.

In a large-scale system, ozone is injected into the contact chambers of the protein skimmers. This not only clarifies the water but also acts as a potent disinfectant, killing pathogens before they can affect the sensitive Rhincodon typus.

Sand Pressure Filters

While we might use sponges or floss, the world’s largest aquariums rely on Sand Pressure Filters. These are giant steel tanks filled with specific grades of sand.

Water is pumped through the sand at high pressure, trapping particles as small as a few microns. Periodically, these filters are “backwashed” to remove the trapped debris—much like how we squeeze out a sponge during a water change.

Georgia Aquarium: The Pride of the West

Before Chimelong took the top spot, the Georgia Aquarium in Atlanta was the undisputed champion. It remains the largest aquarium in the Western Hemisphere and is a must-visit for any serious aquarist.
The “Ocean Voyager” exhibit is the star here. It was specifically designed to house whale sharks and Manta birostris (Giant manta rays). Seeing a manta ray with a wingspan of 15 feet glide over your head is an experience that stays with you forever.

Conservation and Research

What sets the Georgia Aquarium apart is its dedication to science. Because they have the space, they can study the behavior and physiology of large pelagic species in ways that are impossible in the wild.
They maintain strict control over Specific Gravity and temperature to mimic the open ocean. This level of precision is something we should all aim for, even if we are just keeping a few all-in-one saltwater systems in our living rooms.

Species Diversity

Beyond the giants, they house Carcharias taurus (Sand tiger sharks) and an incredible array of colorful reef fish. The diversity is staggering, and the health of the animals is a testament to their world-class Nitrifying Bacteria colonies in their bio-filtration sectors.

Comparing the World’s Aquatic Giants

It’s helpful to see how these massive facilities compare side-by-side. While total volume is the standard metric, the number of species and the size of the largest tank also matter.

S.E.A. Aquarium: Singapore’s Technological Wonder

Singapore is known for its innovation, and the S.E.A. Aquarium (South East Asia Aquarium) is no exception. For a short time, it held the title of where is the worlds largest aquarium before Chimelong’s expansion.
The “Open Ocean” habitat is the focal point here. It features a viewing panel that is 118 feet wide and 27 feet tall. Standing in front of it feels like you are actually on the ocean floor.

Focus on Biodiversity

S.E.A. Aquarium focuses heavily on the habitats of Southeast Asia, the Persian Gulf, and the Arabian Sea. They have one of the world’s largest collections of manta rays, including the rare reef manta.

Education for Hobbyists

One of the best things about this aquarium is the way they explain the nitrogen cycle and water chemistry to the public. They show how Nitrifying Bacteria are the unsung heroes of every tank, regardless of size.
If you are ever struggling with your home biological filtration methods, seeing their massive bio-towers will give you a whole new perspective on the importance of surface area!

Lessons for the Home Aquarist from Public Exhibits

You might think that a 10-million-gallon tank has nothing in common with your 20-gallon planted tank, but the principles of fish keeping are universal. These giant exhibits are just “scaled-up” versions of what we do at home.

1. Stability is King

In massive tanks, water parameters change very slowly because of the sheer volume. This stability is why the fish stay so healthy. At home, we can mimic this by choosing the largest tank our space allows and performing small, frequent water changes rather than large, infrequent ones.

2. Oxygenation Matters

Public aquariums go to great lengths to maintain high Dissolved Oxygen Saturation. They use massive air stones and venturi injectors. In our home tanks, ensuring good surface agitation is the best way to keep our fish active and stress-free.

3. Professional Quarantine

Every single fish that enters the Georgia Aquarium or Chimelong goes through a rigorous quarantine process. They check for parasites and ensure the fish is eating well before it joins the main display. We should always do the same to protect our existing aquatic community!

Maintaining Water Quality on a Massive Scale

How do they keep the water so blue and clear? It’s a question every visitor asks. The answer lies in the constant monitoring of chemistry.

At these facilities, computers monitor pH, temperature, and Specific Gravity 24/7. If a parameter drifts even slightly, the LSS automatically adjusts the dosing or filtration flow.

Managing Nitrate and Phosphate

In a tank with thousands of fish, waste builds up quickly. Large aquariums use massive sulfur denitrator units or carbon dosing to keep nitrates low. This prevents algae outbreaks that could ruin the view through those massive acrylic windows.

The Role of Divers

Technology can only do so much. At the world’s largest aquariums, teams of divers go into the tanks every day. They scrub the acrylic, vacuum the substrate, and hand-feed the larger animals like the Rhincodon typus to ensure everyone gets their vitamins.

Frequently Asked Questions About Giant Aquariums

Which aquarium has the largest single tank?

Chimelong Ocean Kingdom holds the record for the largest individual tank, which is the Whale Shark Exhibit, containing nearly 6 million gallons of water.

Are there whale sharks in any other aquariums?

Yes, the Georgia Aquarium in Atlanta is famous for its whale sharks. It was the first institution outside of Asia to successfully house these gentle giants.

How do they fill these massive tanks?

Most large aquariums are located near the coast. They pump in seawater, which is then filtered and treated to reach the exact Specific Gravity and purity required for the specific animals being housed.

Can you dive in the world’s largest aquariums?

Many of these facilities, including the Georgia Aquarium, offer “Dive with the Giants” programs where certified divers can enter the main tank under professional supervision.

Why is Chimelong considered the largest?

It is considered the largest because it holds the Guinness World Record for total water volume across all its exhibits combined, totaling 12.87 million gallons.

Final Thoughts on the World’s Largest Tanks

Now that you know where is the worlds largest aquarium, you can appreciate the incredible effort it takes to maintain these underwater worlds. From the massive Sand Pressure Filters in China to the conservation efforts in Georgia, these facilities inspire us to be better fish keepers.

Even if we are only managing a small nano tank, the lessons of stability, filtration, and care remain the same. The next time you perform a water change or check your filter, remember that you are using the same scientific principles that keep the world’s largest sharks thriving.

Keep exploring, keep learning, and don’t be afraid to dream big with your own aquarium. After all, every expert aquarist started with their very first tank!