Belle Isle Aquarium: A Complete Guide to Detroit’s Historic Gem

Want to go eye-to-eye with a Moray Eel? Or spot an Albino African Clawed Frog? Or peek in on a Michigan Gar up close?

You can do all of this — for free — at the Belle Isle Aquarium, one of southeast Michigan’s best-kept secrets.

I’ve been visiting this aquarium since I was a kid, and there’s something magical about walking into that green-tiled gallery. It’s small enough to explore in an hour, but fascinating enough that you’ll want to linger. And it pairs perfectly with the Conservatory next door for an easy half-day Belle Isle adventure.

Here’s the simple, local-friendly plan for visiting — plus what to look for once you’re inside.

Belle Isle State Park

The Belle Isle Aquarium sits on 982-acre Belle Isle State Park — an island park in the middle of the Detroit River. If you’ve never been, it’s one of the easiest “I can’t believe this is in the city” nature escapes in Michigan.

Belle Isle Park has been a Detroit gem since the city purchased it in the 1800s. Today, it’s where locals go for everything from picnics and skyline views to beaches, trails, and family attractions that feel surprisingly peaceful for being minutes from downtown.

And the views are unreal: you’ll catch the Detroit skyline, the Ambassador Bridge, and Windsor, Ontario across the water.

While you’re here, Belle Isle makes it easy to turn “a quick aquarium visit” into a full outing — with stops like the Anna Scripps Whitcomb Conservatory, Dossin Great Lakes Museum, and the Belle Isle Nature Center.

Planning note: If you’re driving onto the island, you’ll need a Michigan Recreation Passport. Walking, biking, and riding public transit onto Belle Isle do not require one.

History of Belle Isle Aquarium

The Belle Isle Aquarium opened on August 18, 1904, designed by legendary Detroit architect Albert Kahn (the same architect behind the Fisher Building and dozens of other Detroit landmarks). At the time, it was groundbreaking — the third-largest aquarium in the world and one of the few places in America where ordinary people could learn about marine life.

For decades, it was a crown jewel of Detroit, hosting countless school field trips and family outings. The aquarium survived the Great Depression (though it had to sell off its saltwater fish — including a beloved sea turtle named “Big Pete” who, sadly, became soup).

In 1954-55, the aquarium underwent a major $200,000 renovation that added refrigerated, back-lit tanks and transformed the space. At that point, it had about 3,600 fish of 150 species — the largest collection of freshwater fish ever put on display in North America.

The Closure and Comeback

In 2005, the city of Detroit announced it would close the aquarium to save $530,000 annually. Despite an overwhelming 88% of Detroit voters supporting reopening it, the aquarium remained shuttered for seven years.

But dedicated volunteers from the Friends of Belle Isle Aquarium kept the dream alive, maintaining the building and housing goldfish and koi during winters. Their persistence paid off: on August 18, 2012 — exactly 108 years after it first opened — the Belle Isle Conservancy reopened the aquarium to the public.

It’s been a top Detroit attraction ever since.

The Architecture of Belle Isle Aquarium

Even if you’re not a “museum person,” the building alone is worth your visit.

Albert Kahn designed the aquarium in the Beaux-Arts style. Outside, look for the ornate entrance arch featuring two carved spitting dolphins and Detroit’s emblem. Inside, look up — the sea-green glass tiles lining the arched ceiling give the whole space a dreamy, underwater feel.

Kahn’s vision was that the fish tanks would be like art hanging on the walls of a gallery — and walking through, you can feel exactly what he meant. At 10,000 square feet, it’s intimate compared to modern mega-aquariums, but that’s part of its charm.

This is one of those places that feels both charming and grand at the same time — and it’s part of why the aquarium has such a loyal fan base.

What to See at the Belle Isle Aquarium

This aquarium is all about freshwater life — from Michigan favorites to “wait, THAT’S a fish?” surprises.

You’ll see Great Lakes and regional species like bluegill and perch, plus freshwater standouts like gar and other “prehistoric-looking” fish that always get a reaction. And it’s not just fish — keep an eye out for creatures like the Albino African Clawed Frog and tanks that showcase how different freshwater ecosystems work together.

Featured Collections

• All Seven Gar Species — The only known collection of its kind in North America
• Air-Breathing Fish — One of the largest collections anywhere
• Great Lakes Native Species — Bluegill, Perch, Michigan Gar Pike
• Tropical Freshwater Fish — Catfish, Bichir, Arowana, African Cichlids
• Saltwater Species — Red Snapper, Moray Eel, Clownfish, Starfish
• Amphibians & Reptiles — Red Eared Slider Turtles, Albino African Clawed Frogs
• Endangered Species — Several critically endangered or extinct-in-the-wild species

Conservation Work

The aquarium isn’t just about displaying fish — it’s actively involved in conservation. Staff work with the Michigan Department of Natural Resources to help repopulate sturgeon in the Detroit River, and they conduct frog and mudpuppy studies on Belle Isle to monitor ecosystem health.

Local tip: If you’re visiting with kids, this is a great “first aquarium” because it’s not overwhelming — and monthly Science Saturday presentations (usually the second Saturday of the month) offer hands-on learning.

Frequently Asked Questions