About Us

The Vision

We are committed to the long-term success of the live seafood industry by taking a leading position in the promotion of sustainable aquaculture through renewable technology and solutions. We are focused on promoting higher standards of quality and efficiency to improve environmental and business performances.

OceanEthix International Holdings Limited (OCX), has been researching and developing recycling aquaculture systems in both freshwater and salt water marine environments for over 20 years.

At the core of the business is a green and innovative 100% water recycling and eco-friendly aquaculture and live seafood storage system, with the ability to hold high density volumes in very limited space.

ATOLL the company’s proprietary technology is a modular 100% re-cycling waste water system for long term warehousing and farming of live seafood within the logistics and aquaculture industry.

The ATOLL has been designed to be built without geographical constraints, such as in remote land locked areas or urban centers, and easily retrofitted into existing structures.

OCX’s business model is based on selling, installing and managing ATOLL systems and facilities for customers and partners across the distribution supply chain. The use of sustainable technology and ability to be located in diverse environments has improved the efficiency of the live seafood supply chain and margins.

Business Model Seamless and integrated live seafood supply chain

Sustainable hatchery, grow-out & storage technology, Integrated logistic infrastructure and Branded high value live seafood


  • Korea Maritime Institute, Korea

    Korea Maritime Institute is a government funded research institution under the Prime Minister's Office, South Korea in charge of strategy and policy making for the aquaculture industry.

    They have been tasked by the government to identify, develop and implement new aqua-farming technologies that are more efficient and environmentally friendly as a means to revitalize the fishing industry. Moreover, they also have been seeking technology partners to build multi-story fish farming facilities near urban centers to meet growing demands as well as reduce distribution costs.

    In 2012, OCX has been selected as the preferred technology given its 100% re-circulation and zero waste discharge technology. Trial modules will be installed before the end 2013 and tested with several species for a year.

    The vision is to build "Vertical Aquafarming Centers" (15-20 story buildings) around the country using OCX technology


  • Exotix, Hong Kong

    Exotix is a Hong Kong based wholesaler of premium live seafood to retail, corporate and individual customers.

    To ensure clean and healthy products, Exotix products are stored in Atoll system for depuration to remove chemicals and bacteria, as well as provide a stress free environment for its products.


  • Hong Kong Air Cargo Terminals Limited (Hactl), Hong Kong

    Hactl is one of the world's leading air cargo terminals offering an integrated range of value-added services. Hactl built, owns and operates SuperTerminal 1 – a 390,943 sq. m. facility handling 3.5 million tonnes of cargo a year.  Given its geographical location, state-of-the-art logistics technology and automated handling systems,  Hactl aims to become the transit hub of live seafood products into HK and the Mainland China.  Hactl is an ideal partner for handling and transshipping of live seafood into Hong Kong and mainland China.

    To start testing and developing the transit hub concept for live seafood, an MOU was signed between Hactl and OCX to build ATOLL system within SuperTerminal 1.  On landing in HK, live seafood will be unpacked and stored in ATOLL system until the products are repacked and shipped to other destinations in Mainland China. 



OCX has been maintaining a R&D and small scale operation in Hong Kong since 2004. In this facility, technology and production processes along with business applications have been tested, verified and independently audited.

Currently OCX operates two showroom and demonstration facilities – Hong Kong and Shanghai. The Hong Kong facility has 11 ATOLL systems operating on the 15th floor of a logistics facility with a holding capacity of 5 to 7 tonnes.

The second facility in Shanghai, has two ATOLL systems operating within the Xi Jiao International Fresh Food Logistics Market.

These locations are a key part of the business development process to demonstrate the full potential of ATOLL technology, by piloting projects and testing business assumptions for customers’ before they commit to a project.


  • Xijiao International Market, Qingpu

  • Lotus Supermarket, Pudong

News & Opinion

  • License Agreement with Global Marine Seafood Connection, Ltd.

    Signing of a Master License Agreement with Global Marine Seafood Connection, Ltd., Singapore for the exclusive rights to use Atoll technology. The license was for a ten year period

  • Business News Western Australia

    March 21, 2014, “Fresh Idea for Seafood Transport”

    Have a look at the following link: Click here

  • CNN News

    CNN news on the state of live seafood trading in HK and how a new technology, OceanEthix, is helping reshape fish farming to ensure sustainability, food safety and better economics.

    Have a look at the following link: Click here

  • CNBC & National Geographic

    Over the last few months there has been considerable favourable press commentary about our business. Have a look at the following link and our website: www.cnbc.com/id/35834973

    In addition, we have been interviewed by National Geographic for a segment in their documentary ‘Fish Wars’ to be released later in the year. The documentary is about the illegal and destructive fishing practises endemic to the Coral Triangle. We were invited to talk about our vision for the live reef fish industry and how our holistic approach to the industry delivers satisfactory commercial, environmental and social outcomes.

  • Marine Culture Technology

  • The World's Fish Basket

Investor Relations

OceanEthix International Holdings Limited is a public company traded on the NSX Stock Exchange of Australia (OCX). We provide sustainable technical solutions and services for the storage and farming of live seafood.

With two showrooms in Hong Kong and Shanghai, we offer customized solutions along various intersections in the seafood supply chain.

Download Research Report on OCX by Gordon Capital (167kb, pdf)

Letter - Board and Management Changes (167kb, pdf)

Disclaimer: The information contained in the press releases, broadcasts or other communication on this site is current only as of the dates on which the respective items were issued. We do not review past postings to determine whether they remain accurate, and the information contained in these postings may have been superseded. We make no representations or warranties with respect to the information contained herein and take no responsibility for supplementing, updating, or correcting any such information.

Our Team

Board of Directors

  • Brian Wong Managing Director

    Brian Wong is currently executive director of Murchison Holdings Limited and Quest Investments Limited, both companies listed on ASX. He has over 20 years working experiences in banking, accounting and auditing including at Hang Seng Bank Limited and Citibank Limited. Brian is a fellow of the Association of International Accountants and associate member of the Hong Kong Securities Institute. He holds a Master degree in Accounting bestowed by Curtin University of Australia.

  • Nicole Kit Hung Tang Non-Executive Director

    Nicole Tang is currently the Chairlady of Focal Creation Group, a privately owned investment group. Before she joined the financial service sector, Nicole was the CEO of her family business, a major importer for electronic brands for the Chinese market. Nicole has over 10 years working experiences in Telecom, IT and Investment sectors. Ms Tang received her education from Columbia University, Canada.

  • Nigel Kong Yiu Wong Chief Finance Officer

    Nigel Wong is a certified public accountant in Hong Kong. He has over 20 years audit experiences in the commercial sector. He is the owner of the consultancy firm, Nigel Wong Company Limited, in Hong Kong. His qualifications include Fellow of Hong Kong Institute of Certified Public Accountant and Chartered Association of Certified Accountants and member of Hong Kong Tax Institute.

  • John Zhong Non-Executive Director

    John Zhong is an accountant in Sydney. He has over 20 years experience in the commercial sector and knowledgeable with Australian and Chinese business environment. He is one of the executive in an Australian based media company. John holds Bachelor of commerce (International Study) from University of Sydney.

  • John Dick Company Secretary


Our People

  • Helen (He Fang) Gao General Manager, China

    Helen has over 15 years experience in the food retail and distribution businesses, of which she worked eight years as a marketing executive and five years in general management. Her previous employers include Applebee's International (US), Perdue Farm (US), Minor Food Group(Thailand), CP Food Products, Dah Chong Hong Limited (under CITIC group). Helen holds a BA in economics and foreign trade from Shanghai University of International Business and Economics, and MA in Business Administration from Shanghai JiaoTong university.

Contact Us

View on Google maps

OceanEthix International Holdings Limited

Hong Kong

Address: 15/F Goodman Shatin Logistics Centre II, 6 Wong Chuk Yeung Street, Fo Tan, Hong Kong.

Tel: +852 6307 4004

Fax: +852 2898 7808

Brian Wong

Managing Director


What is the key difference between ATOLL and other re-circulating systems?

Other re-circulating systems basically bring in 10+% of water daily from an external source and discharge waste water to remove build up of ammonia, nitrates and nitrites. They use basic ultraviolet sterilization technology, which is not efficient for high density biomass.

How many modules can be operated by one person? If we build a fish farm of 100 modules, how many technical staffs, general workers and biologist is needed?

Generally for the entire operation you need 1 marine biologist; 2 system technician (system maintenance and repair); and 5-7 operational/farming technician (feeding, inventory check, stock packing & unpacking, etc).

What is the electricity consumption per module?

Each standard circular module consumes 130-180kwh p/24 hours. Electricity rate will differ by location.

What is the amount of waste and discharge from a single module per month?

Average FCR (Food conversion ratio) is 1.3 kg feed to grow-out 1 kg of fish weight. Assuming 12 months grow-out to achieve 700 kg gross livestock weight, average 17.5 kg per month of waste per module. This waste is treated within the system with no discharge into the environment.

Some growers report slower growth of livestock when using automatic feeding system. Is this also experienced with ATOLL?

ATOLL uses automatic systems, and we also hand feed to actually observe the fish as they feed. This is to ensure all are eating not just the strongest fish which get to the food first. Hand feeding results higher growth rates and better FCR's.

If ATOLL module is entirely automated, can the modules be connected and controlled by a single control room?


Based on the standard unit footprint 40% is used for livestock grow-out tank and 60% used for treatment of water. Can the water treatment system and configuration be made more compact?

Yes. Over the years we have tested a number of configurations to get to the optimum configuration as there are trade-offs between stock density and water quality effecting economics, environmental and sustainability factors. The final configuration will depend on the actual site (ie., ceiling height, pillars, etc).

Can more than one livestock tank be linked to a single water treatment system? This would considerably reduce the footprint requirement.

We have assessed this, and determined that separate systems are the most cost effective in terms of - individual temperature and grading control, and disease mitigation. Large central systems are also considerably more expensive, thereby reducing return on capital. For example, if the filtration system is centralized it increases the risk and cost of contamination from one batch of diseased fish to the other tanks.

How is the salinity managed?

It is checked daily by the technician on site, along with other water quality tests.

What is the depreciation cost of the ATOLL system?

We use 5 years for accounting purposes, and tank’s operational life is 10+ years.

Can ATOLL be used for warehousing and distribution of live seafood?

Yes. The system can be configured differently from farming to accommodate short/long term warehousing of live seafood.

Comparison of ATOLL vs. Other RAS systems

Requires 5 to 10% of volume water replacement per day Requires 0% water replacement
Discharge of waste and water treatment No discharge of waste as water is treated internally
Centralized drum filtering No centralized drum filtering
Constant cleaning and water flushing of drum filters No requirement to constantly flush and clean
No flexibility in design due to centralized filtering Modular design, with each AOLL module mutually exclusive to each other
Centralized implication for disease spread and control Disease and parasite control limited to module infected, with no ability to infect other holding tanks
Bio filtration clogging and requiring regular cleaning Self cleaning Bio filter
Bio filtration unable to adjust quickly to meet spikes in ammonia Bio filter capacity self manages to handle spikes in ammonia and dissolved organics
Higher electricity costs associated with pumps used in centralized operations moving large volumes of water, temperature maintenance Smaller pumps due to modular design requiring less power; no water exchange requiring less heating/cooling
UV sterilization unsuitable for high density stocking Use of Ozone to remove disease and bacteria without effecting stock
Pipe work design reducing flow efficiency and increasing bacteria build up Pipe lengths are shorter due to modular design, ozonation requires no manual cleaning
Manpower requirements to manually clean and wash out system Low manpower requirements due to automated self cleaning
Require close proximity to water sources No need to be located close to water
Limited by existing building configurations such as drainage Can be retrofitted into any building configuration
Additional storage capacity of supply water required to preheat/cool water No preheating or cooling of supply water, as ATOLL do not need to continually replace water
RAS design frequently results in:
  • Ammonia build up in systems due to inadequate water flow through system
  • Oxygen levels becoming low as biomass increases.
  • Ph dropping due to CO2 buildup
  • No Ammonia build up
  • Dissolved Oxygen remain stable
  • No CO2 build up