What's The Biggest Aquarium In The United States

The biggest aquariumin the United States is the Georgia Aquarium located in Atlanta, Georgia. Holding more than 10 million gallons of water, it surpasses all other American facilities in total volume and offers visitors a chance to walk through some of the most impressive marine habitats on the planet. In this guide we explore why the Georgia Aquarium earns the title of largest, what makes its exhibits unique, how it supports education and conservation, and what you need to know before planning a trip.

What Defines the “Biggest” Aquarium?

When people ask about the biggest aquarium, they usually refer to one of two metrics:

1. Total water volume – the amount of gallons or liters the facility holds across all tanks.
2. Floor space or exhibition area – the physical square footage devoted to public displays.

Most rankings, including those from the Association of Zoos and Aquariums (AZA) and industry publications, prioritize water volume because it directly reflects the scale of the habitats and the diversity of species that can be housed. By this standard, the Georgia Aquarium’s 10 million‑gallon main tank (the Ocean Voyager exhibit) alone makes it the largest in the nation.

The Georgia Aquarium: America's Largest

Size and Scale

• Total water volume: > 10 million gallons (approximately 38 million liters). - Main exhibit (Ocean Voyager): 6.3 million gallons, featuring a 100‑foot‑long acrylic tunnel.
• Overall footprint: ≈ 550,000 square feet of indoor space, including galleries, behind‑the‑scenes areas, and research labs.
• Annual visitors: over 2 million guests, making it one of the most attended cultural attractions in the Southeast.

History and Mission

Opened in 2005 thanks to a $250 million donation from Home Depot co‑founder Bernie Marcus, the aquarium was designed to inspire awe while advancing marine science. Its mission statement emphasizes education, conservation, and research, aiming to connect people with the ocean’s wonders and promote stewardship of aquatic ecosystems.

Key Exhibits and Attractions

The Georgia Aquarium is divided into several distinct galleries, each replicating a specific marine environment. Below are the highlights that draw repeat visitors.

Ocean Voyager

• Centerpiece: The 6.3‑million‑gallon tank houses whale sharks, manta rays, grouper, and countless schooling fish.
• Experience: A 100‑foot acrylic tunnel lets guests walk beneath the swimming giants, providing a 360‑degree view. - Fun fact: It is one of only a few facilities outside of Asia that successfully keeps whale sharks in captivity.

Tropical Diver- Focus: Vibrant coral reefs from the Indo‑Pacific region.

• Species: Over 100 types of reef fish, seahorses, and live coral colonies.
• Interactive element: Touch pools where visitors can gently feel stingrays and small invertebrates under staff supervision.

Cold Water Quest- Environment: Mimics the frigid waters of the North Pacific and Antarctic.

• Residents: Beluga whales, sea otters, puffins, and the iconic Australian sea dragons.
• Highlight: The beluga habitat includes a massive underwater viewing window that lets you see these whales glide gracefully.

River Scout

• Theme: Freshwater ecosystems from around the globe, including the Amazon, Mekong, and Mississippi rivers.
• Exhibits: Giant river otters, piranhas, electric eels, and a massive American alligator swamp.
• Educational angle: Demonstrates how freshwater systems connect to ocean health.

Dolphin Coast

• Showcase: Atlantic bottlenose dolphins in a state‑of‑the‑art habitat designed for both performance and enrichment.
• Daily presentations: Combine acrobatic displays with messages about marine mammal conservation.

Sharks! Predators of the Deep

• Feature: A walk‑through tunnel surrounded by sand tiger sharks, zebra sharks, and hammerheads.
• Purpose: To dispel myths and highlight the ecological importance of apex predators.

Visitor Experience and Educational Programs

Interactive Opportunities

• Behind‑the‑Scenes Tours: Small‑group experiences that take you into animal care labs, food preparation areas, and water‑quality monitoring stations.
• Sleepover Programs: “Night at the Aquarium” lets families camp beside the Ocean Voyager tank after hours.
• Touch Tanks: Available in Tropical Diver and River Scout, supervised by marine educators.

Learning for All Ages

• School Field Trips: Curriculum‑aligned programs covering topics such as marine biology, climate change, and conservation genetics.
• Summer Camps: Week‑long immersive experiences for kids aged 6‑14, featuring hands‑on experiments and animal encounters.
• Lecture Series: Quarterly talks by renowned scientists, ranging from coral restoration techniques to shark migration patterns.

Accessibility

The aquarium provides wheelchair rentals, assistive listening devices, and sensory‑friendly mornings with reduced lighting and sound levels to ensure an inclusive visit for everyone.

Conservation and Research Efforts

Beyond entertainment, the Georgia Aquarium invests heavily in protecting marine life.

• Rescue and Rehabilitation: Operates a dedicated sea turtle rescue center that has released over 500 rehabilitated turtles back into the wild.
• Breeding Programs: Successful captive breeding of beluga whales, whale sharks (through assisted reproductive techniques), and several coral species.
• Research Partnerships: Collaborates with universities and NOAA on projects studying ocean acidification, marine mammal health, and sustainable fisheries.
• Sustainability Initiatives: The facility runs on a combination of renewable energy credits and water‑recycling systems that reduce its environmental footprint.

How It Compares to Other Major U.S. Aquariums

While the Georgia Aquarium leads in total volume, other institutions excel in different areas:

SheddAquarium – A Chicago Landmark

The Shedd Aquarium, perched on the lakefront of Chicago, holds roughly 5 million gallons of water and showcases an impressive collection of freshwater and marine species. Its hallmark exhibits include the Caribbean Reef, the Abbott Oceanarium, and the Polar Playzone, where visitors can observe beluga whales, dolphins, and a thriving kelp forest. Shedd distinguishes itself through its focus on animal welfare, offering state‑of‑the‑art habitats that prioritize behavioral enrichment and health monitoring.

Other Notable U.S. Aquariums

• Newport Aquarium (KY) – Renowned for its “Shark Ray Bay” tunnel, where guests can walk beneath a massive tank housing cownose rays and epaulette sharks.
• SeaWorld San Diego (CA) – Combines marine animal presentations with rides, emphasizing marine rescue narratives and guest interaction.
• Aquarium of the Pacific (CA) – Highlights Pacific ecosystems, featuring a massive “Blue Whale” model and a cutting‑edge “Shark Lagoon” that incorporates interactive digital displays.

Each venue brings a unique angle to public marine education, whether through immersive tunnels, animal‑focused storytelling, or technology‑driven exhibits.

The Bigger Picture: Why Size Matters

Large‑scale facilities like the Georgia Aquarium enable researchers to maintain breeding colonies of species that would be impossible to study in smaller settings. The sheer volume of water creates stable environments that mimic oceanic conditions more closely, allowing for long‑term behavioral studies and the development of husbandry techniques that can later be applied to wild populations. Moreover, the expansive habitats attract millions of visitors annually, generating significant funding that supports conservation projects worldwide.

Looking Ahead

Future plans for the Georgia Aquarium include expanding its coral‑restoration laboratory, adding a dedicated “Deep‑Sea Exploration” gallery, and launching a mobile outreach program that brings portable touch‑tank experiences to schools in underserved communities. These initiatives aim to deepen public engagement while reinforcing the institution’s commitment to scientific innovation and environmental stewardship.

Conclusion

From its record‑breaking water capacity to its cutting‑edge animal care facilities, the Georgia Aquarium exemplifies how a modern aquarium can blend entertainment, education, and conservation into a cohesive mission. By offering unparalleled visitor experiences, fostering groundbreaking research, and championing global marine protection, the institution sets a benchmark for aquatic centers across the nation. As new technologies emerge and public awareness of ocean health grows, the aquarium’s forward‑looking strategies promise to keep it at the forefront of marine advocacy — ensuring that the wonder of the underwater world continues to inspire generations to come.