The Dallas Aquarium covers 207,000 square feet and holds 22 million gallons of water

The Dallas World Aquarium occupies a 207,000-square-foot building in downtown Dallas, with 22 million gallons of water across its exhibits. That makes it one of the larger aquariums in the United States by both building footprint and water volume. The facility spans multiple levels and includes both indoor exhibits and outdoor areas, so the actual space you walk through feels larger than a single-floor building would.

The size matters because it determines how many exhibits fit inside and how much room the animals have. A 22-million-gallon system can support larger species and more complex habitats than smaller facilities. The building's footprint also means you'll spend time walking between sections rather than seeing everything from one spot.

Key Takeaways

  • The Dallas World Aquarium is 207,000 square feet with 22 million gallons of water, making it a mid-to-large facility by U.S. standards.
  • The building spans multiple levels and includes both climate-controlled indoor exhibits and outdoor areas, so plan for a full day of walking.
  • The size allows for exhibits with larger animals like sharks, rays, and sea turtles that need substantial water volume and space.
  • The facility includes a separate Shark Reef exhibit and a Penguin Colony, each with its own entrance and viewing areas.

How the space breaks down into different sections

The main building contains the core aquarium exhibits, including freshwater and saltwater tanks, a ray touch pool, and the Shark Reef area. The Shark Reef is a separate, high-capacity exhibit that accounts for a significant portion of the total water volume because sharks and large rays need deep tanks and strong water circulation.

Outside the main building, the facility includes a Penguin Colony with its own climate control and viewing areas. This outdoor section adds to the total square footage but is not climate-controlled in the same way as the indoor exhibits. The layout means you move between indoor and outdoor spaces as you progress through the exhibits, so wear comfortable shoes and plan for temperature changes.

Comparison to other major U.S. aquariums

The Georgia Aquarium in Atlanta is larger, with 10 million gallons and a 550,000-square-foot building. The Monterey Bay Aquarium in California holds 750,000 gallons but spans a smaller footprint because it uses vertical tank design. The Dallas facility ranks in the middle range — larger than many regional aquariums but smaller than the very largest public facilities.

Size does not always determine what you see or how long you stay. A smaller aquarium with dense exhibits can take as long to walk through as a larger one with more open space. The Dallas Aquarium's 22 million gallons support a mix of large tanks (like the Shark Reef) and smaller, specialized exhibits, so the experience varies by section.

How long to plan for your visit

Most visitors spend two to four hours at the Dallas World Aquarium. The time depends on how slowly you move through exhibits, whether you stop at the touch pools, and if you watch any scheduled feeding demonstrations or presentations. The building's size means you will walk a fair distance, so budget time for that movement between sections.

The facility does not have a single loop route — you navigate between exhibits and can backtrack if you miss something. Some visitors spend the full four hours; others move through in two. The outdoor Penguin Colony adds time if you visit it, especially if you wait for the penguins to be active.

What the water volume means for the animals

Twenty-two million gallons sounds abstract, but it translates to specific tank sizes for different species. The Shark Reef alone holds millions of gallons because sharks need large, open swimming space and constant water circulation. Smaller exhibits for seahorses, jellyfish, or tropical fish use far less water per tank but still require precise filtration and temperature control.

The total volume also supports the facility's life support systems — filtration, aeration, temperature regulation, and chemical balance. Larger systems can absorb small changes in water chemistry more gradually than smaller tanks, which gives the animals more stable conditions. This is why size matters beyond just "more water equals more fish."

Accessibility and layout for visitors with mobility needs

The main building is wheelchair accessible, with elevators between levels and ramps in most exhibit areas. The outdoor Penguin Colony has limited wheelchair access because it was built on uneven ground. Strollers are allowed in most areas, though crowded times can make pushing a stroller difficult.

The facility has benches throughout, so you can rest between sections. If you have mobility concerns, ask staff at the entrance about the most accessible route through the exhibits — they can suggest which sections to prioritize if you cannot walk the entire building.

Frequently Asked Questions

Is the Dallas Aquarium bigger than the one in Houston?

The Dallas World Aquarium is larger than the Houston Museum of Natural Science's aquarium section by water volume and building size. However, the Houston facility is part of a larger museum complex, so the total space you visit may feel comparable. The Dallas facility is dedicated entirely to aquatic exhibits.

Can you see all the exhibits in one day?

Yes, most people see all the main exhibits in a single visit lasting two to four hours. The building is designed as a continuous path through different sections, though you can move at your own pace. Some visitors skip the outdoor Penguin Colony if time is short.

Is there a lot of walking involved?

Yes, the 207,000-square-foot building means you will walk a significant distance, especially if you visit all sections. Wear comfortable shoes and plan for multiple levels and transitions between indoor and outdoor areas. The facility is not designed as a single compact loop.

What is the deepest tank in the aquarium?

The Shark Reef is the deepest and largest exhibit, but the exact depth is not publicly listed. It is deep enough to accommodate large sharks and rays that need substantial vertical space. Most other exhibits are shallower and designed for specific species with different depth requirements.

Are there exhibits on every level?

The main building has multiple levels with exhibits on each, but not every level has the same number or type of exhibits. The layout is designed to move you through different habitats rather than to have equal space on each floor. Some levels are primarily circulation space between major exhibit areas.