About
The Underwater Gardener is a saltwater aquarium shop and coral farm on North Roosevelt Boulevard in Key West, set in the Overseas Market plaza next to Five Guys, a few minutes from the airport. It held its grand opening in July 2025 and caters to reef keepers from first-timers to experts. Multiple display reef tanks greet visitors, and more than one reviewer says the shop is worth a stop just to look around.
Aquacultured coral for sale in Key West, FL is the core of the business. Frag tanks hold a mix of aquacultured, wild-caught and locally collected specimens, and the livestock list runs from soft corals, LPS and SPS to anemones, invertebrates, marine fish and local Keys species. One reviewer describes the livestock as vibrant and healthy, and another reports good results with every coral and fish bought here.
On the hardware side, the store is an authorized Red Sea dealer and can help build out a new Red Sea system or one from another major brand, including Waterbox, Innovative Marine and Aquaforest, with Hydros equipment in the mix as well. Shelves cover lighting, flow, filtration, dosing pumps, testing supplies, food and cleaning equipment, plus live rock, live sand and R/O water, and customers say they can find everything a saltwater tank needs in one place. Help extends past the register.
Water testing is a paid bench service: bring in a sample, and staff run it with you and talk through what the numbers mean for your tank. One regular comes in about once a week for testing and advice, and the shop also offers aquarium services that a grand-opening visitor said make a saltwater tank manageable even with rookie knowledge. Reviewers call the team knowledgeable and friendly, a few mention their patience with newcomers, and a couple single out the owner's reef experience.
What they offer
Fish & livestock for sale at The Underwater Gardener in Key West, FL
The Underwater Gardener stocks corals, reef fish, invertebrates, anemones, live rock and saltwater fish for sale in Key West, FL. As an aquarium store serving Key West, FL, it also carries aquarium equipment, dry goods and fish food and offers aquarium consultations, aquarium setup, tank maintenance and water testing.
- Livestock & products
- Specializes in
Highlights
What makes them special
- Aquarium shop and coral farm with aquacultured coral
- Soft corals, LPS, SPS, anemones, inverts and marine fish
- Authorized Red Sea dealer, plus Waterbox and Hydros
- Water testing bench service with results explained
- Knowledgeable, patient staff who help beginners
From keepers
Customer reviews
“As a first time reef hobbyist, Jaime and the shop have been a godsend. Any questions I have gets answered expertly and the overall vibe of the place is amazing. Highly recommend visiting and checking out what they have!!”
— JJ Aguinaga5.0a month ago“Love the store and there are so many corals to choose from. The owner is extremely experienced and has helped me with any questions I have. I highly recommend this store.”
— William Horn5.03 months ago“Great store, amazing corals and fish. Highly recommend coming here.”
— Lorenzo5.03 months ago“Great place to get all my saltwater fish tank needs. Great staff knowledgeable about everything they sell. We have had great luck with all the corals and fish purchased at this store highly recommend.”
— Jeffrey Codde5.04 months ago“This is exactly what the island needs. From beginners to experts, you need to stop in here. The staff is knowledgeable and friendly. Can't wait to see this place succeed. If you're thinking about getting into fish and corals, you wont go wrong here. Even if you want to just look, its wotlrth the stop. Just as good as any aquarium, if not better.”
— Jon Stockton5.05 months ago“A+++ Local Fish Store! Very clean store and beautiful tanks.”
— LuisL.5.05 months ago“This is a top level Saltwater reef aquarium shop, Jamie and the staff, are Super friendly and approachable, with a high level of knowledge of Reef aquariums. Shop is well stocked with supplies and equipment, and a fantastic selection of vibrant and healthy, corals, fish and Invertebrates.”
— Phil demena5.05 months ago“Couldn’t recommend this shop more. I came in knowing nothing about saltwater tanks, and thanks to them, I’ve picked up the knowledge and confidence to keep everything running smoothly. Super knowledgeable, patient, and genuinely care about helping you succeed—not just making a sale. Easily the best place to go if you’re getting into the hobby.”
— brett reinholz5.05 months ago“This is a great shop with an amazing selection of coral.And fish. And enough good things cannot be said about the owner. Such a great vibe at this shop.!!!”
— Austin Barnhill5.06 months ago“What an incredible store I’ve lived in Key West my whole life. There’s never been a saltwater aquarium store that even comes close to this place. Absolutely everything you need to start a tank from a nano all the way to a public aquarium size tank. These guys can get you right The owner Jamie is the most knowledgeable guy I’ve met in the aquarium industry thus far Mattie is his right hand she runs the shop most of the time and is absolutely amazing quality of the corals is top notch!!!!!!”
— Devin Gilman5.07 months ago
Reference
Frequently asked questions
Note — Store information and services may change. Always call (305) 850-9949 to confirm current availability, hours, and services before visiting The Underwater Gardener.