Awarded the 2026 Consumer Choice Award!
We are incredibly proud to announce that Under The Sea Aquatics Inc. has been selected as the **2026 Consumer Choice Award recipient** in the category of **PET & AQUARIUM CENTRE** for the Niagara Region!
This award is a testament to our commitment to quality products, expert advice, and outstanding customer service. Thank you for your continued trust and support!
Our Passion for the Deep
We’re more than just a store. We’re a family of dedicated aquarists, marine biology enthusiasts, and hobbyists committed to bringing the beauty and wonder of the underwater world into your home, responsibly and sustainably.
From Hobby to Vocation
Founded in St. Catharines, Under the Sea Aquatics began as a family’s shared passion. We were hobbyists frustrated with the lack of quality, healthy livestock and expert, honest advice. We knew there had to be a better way.
We built our shop on a simple principle: put the animal’s health first. This means meticulous quarantine processes, partnerships with responsible suppliers, and an expert staff that genuinely cares about your success. We’re here to help you build a beautiful, low-stress aquarium that thrives for years to come.
How We Work
01
Consultation & Planning
We start by understanding your vision. Whether it’s a home aquarium or a large commercial setup, our team discusses your goals, space, and budget to design the perfect aquatic environment.
02
Design & Proposal
Our experts create a customized aquarium design plan, including tank size, equipment, aquascaping, and species selection. You’ll receive a detailed proposal with clear options.
03
Installation
We handle everything — from setting up tanks and filtration systems to carefully placing plants, corals, and fish. Our professional installation ensures beauty, safety, and durability.
04
Maintenance & Support
Our job doesn’t end at installation. We provide ongoing maintenance, water testing, and expert care tips, ensuring your aquarium thrives for years to come.
Expertise You Can Trust
Quarantine First
Every single animal that enters our store undergoes a strict quarantine protocol. We ensure they are healthy, eating, and pest-free *before* they’re ready for your tank.
Expert Staff
Our team isn’t just trained in sales—they’re experienced aquarists and marine biology enthusiasts. We provide honest, science-backed advice, not just quick-fix solutions.
Community Hub
We’re more than a shop; we’re a place for hobbyists to connect. We host workshops, share inspiration, and foster a local community that shares our passion for the aquatic world.
Meet the Founder
SM
Sebin Mathew
Founder, CEO & Lead Aquascaping Designer
Sebin is the heart and soul of Under the Sea Aquatics. With over two decades of hands-on experience in marine biology and aquaculture, he personally designed the store’s industry-leading quarantine process. Sebin ensures every aspect of the business, from customer consultation to livestock health, meets the highest standards of responsibility and care.
Ready to Start Your Journey?
Visit us in-store to see our quarantined livestock, or get in touch with our expert team to plan your dream aquarium today.