Tucked into a small strip mall on North Avenue, Big Fish Aquarium has quickly become one of Chicago's most talked-about aquarium shops. The space is compact — reviewers consistently note it's on the smaller side — but the density of quality livestock packed into those well-maintained tanks is remarkable. Freshwater and saltwater fish swim in clean, organized displays alongside a solid coral selection and vibrant live plants that customers describe as genuinely healthy.
The staff, particularly employees named Zach and Eddie, earn frequent praise for their patience and willingness to walk customers through everything from tank cycling to species compatibility. One customer recounted purchasing a complete aquarium setup after an extensive conversation with Eddie, and two months later had over 40 fish thriving in the tank — a testament to the quality of guidance offered here. Another shopper highlighted a thriving 12-gallon betta tank built entirely with Big Fish's help.
Beyond retail, Big Fish provides in-home aquarium maintenance services across the Chicago area. A downtown school brought them in to deep-clean a turtle aquarium and praised the flexibility in scheduling and the quality of the work. Multiple customers confirm that their tank cleaning service delivers impressive results, even if the shop is still refining its scheduling and communication processes.
Pricing draws mostly positive remarks. Neocaridina shrimp are competitively priced, and several reviewers mention fair prices on fish across the board, though at least one noted costs run higher than chain pet stores. The shop also offers a membership program that provides additional perks for regular hobbyists.
Big Fish stocks crabs, invertebrates, and hard-to-find species that draw customers from over an hour away. The store's passion is palpable — from the carefully curated livestock to the staff's genuine enthusiasm for helping people succeed in the hobby. For Chicago aquarists looking for a neighborhood shop with real expertise and healthy stock, Big Fish Aquarium delivers.
Erin Ferguson
15 reviews
Always a great experience. Zach is helpful, knowledgeable, and incredibly patient. Excellent selection of healthy fish, plants, and aquatic supplies. Truly a hidden gem in Chicago!
john cundari
5 reviews
Love this store. Healthy fish and nice people. Would love to see them design and incorporate bioactive enclosures for amphibians and other little creatures
Claudette Evert
2 reviews
A hidden gem, this place is wonderful, clean, healthy fresh and salt water fish. Beautiful plants and anything you need for a beautiful tank.
Sarah Ferguson
13 reviews
Zach was sooo helpful! Super knowledgeable and made our experience totally painless and we are excited to come back!
Paul McCall
3 reviews
great service and knowledgeable of products!
Rolfe Sanberg
40 reviews
The moment I walked into Big Fish Aquarium I was greeted professionally and politely. Within 5 minutes I observed the shop to be clean, stocked, and offered a large variety of aquarium life. In moments I came to the realization that the entire staff were passionate, knowledgeable, friendly, helpful, patient, and more than happy to further my education in the hobby. I decided to purchase a complete aquarium setup that evening after an extensive conversation on what aquarium tank systems would work and what progression to gradually at aquarium life to the tank. Special shout out to Eddie. I found the entire staff to be excellent. Thanks to them, I have restarted a most enjoyable hobby that I had left many years ago. I forgot how happy, peaceful, and fulfilling it could be. Hats off to Big Fish Aquarium. Bravo! Addendum: It has now been over two months since I bought this aquarium at Big Fish Aquarium. This tank now has over 40 fish 🐠 happily thriving within. The staff at the store continue to provide me with sound advice and knowledge to enhance my abilities to create as well as maintain my aquariums. Kudos to Eddie and all of the staff. Thank you. Your knowledge is appreciated.
Wilson Valentin
4 reviews
Nice variety of fishes i recommend coming here
Edward Morales
4 reviews
Great customer service 👏
isis proenza
38 reviews
Small but cozy and Interesting store. Nice discount to start the year, healthy fish and it's worth the one hour drive.
Terrence ODonnell
10 reviews
This place is a hidden gem ! They have a great stock of fish and staff is very helpful.
Note: Store information and services may change. Always call (773) 295-5175 to confirm current availability, hours, and services before visiting Big Fish Aquarium.
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6816 W North Ave, Chicago, IL 60707
February 7, 2026
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