A selection of aquarium fish in Northwood and Watford

If you are looking for different varieties of fishes for your aquarium, contact us. Book an appointment today to view our fish stock in Northwood or Watford.

Our Services




Fish & Coral

We stock:

  • Tropical and freshwater fish
  • Cold water fish
  • Marine fish
  • Live corals
  • Live plants
  • Second-hand aquarium equipment

    If you’re looking for second-hand equipment for your aquarium, contact Underwaterworld. We sell refurbished equipment, including aquariums, cabinets, chillers, skimmers, external filters, pumps, T5 light units, sump tanks, RO units and much more. Contact us for more details.


    “Underwaterworld regularly serviced our fish tank and were involved in the installation of this into our living room. They have always been available to assist with any emergency problems and the tank is looking fantastic.”

    – Sarah Greaves

    “Mark and his team are very friendly, knowledgeable, and always at hand should we need assistance. They maintain a high level of customer relations, we are pleased to have done business with them, and have given their names to other companies.”

    – Chris Turner

    “Mark and his team have been maintaining my aquarium for over a year now. They provide a consistently reliable and high quality service and I know that I don’t need to worry about the job being done the way I would like it. I would have no hesitation in recommending them to others.”

    – Gary Acton

    Safe handling of the fish stock

    At Underwaterworld, we undertake all the safety precautions while handling your fish stock. We feed and quarantine all the fish for 7 days before sale, and our fish stock is checked by the environmental service regularly.

    Our experts have the experience and the expertise to transfer the fish stock safely to their new home. Get in touch with your queries today!

    To view our aquarium fish stock, book an appointment today! Call us on