>R4.3 billion

in annual hake sales


deep-sea trawlers (replacement value of R3.7 billion)

R7.6 billion

in investments (vessels and processing assets)


annual spend with SMMEs

The South African trawl fishery for hake is certified by the Marine Stewardship Council, the world’s leading certification and eco labelling programme for sustainable, wild-caught seafood.


The SADSTIA Constitution sets out the fundamental principles according to which the Association is governed. SADSTIA’s first constitution was adopted on 24 March 1974 and an updated constitution was adopted on 12 September 2002. This was in recognition of the fact that circumstances in South Africa and the deep-sea trawling industry changed considerably in the intervening years, with membership of the Association being opened to a much larger number of vessel operators.

Our Commitee

Innocent Nkosi Dwayi


Innocent Nkosi Dwayi is group human resources director of Sea Harvest, responsible for the management of human capital across all Sea Harvest business units. Innocent holds a Master’s degree in Business Leadership from the University of South Africa’s School of Business Leadership and a Master’s degree in Law, specializing in Labour Law from the University of Cape Town (UCT). He also holds a Bachelor’s degree in Human Resources Management from the Cape Peninsula University of Technology and a Postgraduate Diploma in Management from the Graduate School of Business, UCT. Innocent serves as Business Unity South Africa’s representative at the National Economic Development and Labour Council (Nedlac) in the Labour Market chamber.

Madoda Khumalo

Vice chairman

Madoda Khumalo is strategic services executive at Sea Harvest. His area of responsibility includes fishing rights, transformation, sustainability and communications. He is a marine biologist by training, having completed a Bachelor of Science (Hons) degree in Ocean Atmospheric Science and Environmental Management at the University of Cape Town in 2009, and a Master of Science degree at the same university in 2012.

Johann Augustyn


Johann Augustyn is secretary of SADSTIA, responsible for the day-to-day administration of the Association. Johann worked as a marine scientist for more than 20 years before being appointed as a fisheries manager, originally in the Department of Environmental Affairs and Tourism, and later the Department of Agriculture, Forestry & Fisheries (DAFF). He was appointed secretary of SADSTIA in 2014.

Fisokuhle Mbatha

Research & Development Coordinator

Fisokuhle Mbatha is Research & Development Coordinator, responsible for overseeing SADSTIA-funded and supported research projects such as a self-monitoring programme for the management of endangered, threatened and protected species; the offshore bycatch fishery improvement project; and the testing of a bird scaring line tension device. She assists in the implementation and coordination of research projects that contribute to the certification of the trawl fishery by the Marine Stewardship Council and coordinates SADSTIA-funded training programmes and research grants. Fisokuhle holds a Master’s degree in Applied Marine Science from the University of Cape Town.

Kobus Maritz


Kobus Maritz is the managing director of SeaVuna Fishing Company which operates in both the inshore and deep-sea trawl fisheries for hake. He plays an active role in the management and regulation of both fisheries, serving as chair of the South East Coast Inshore Fishing Association and as treasurer of SADSTIA. Kobus holds an Honours degree in accounting and is a registered chartered accountant. Before taking up his position at SeaVuna he was chief financial officer at Sea Harvest.

Robert Landman

Chair of the Scientific Committee

Robert Landman is business insights manager at Irvin & Johnson Limited, responsible for providing science-based insights to ensure the company’s fishing fleet performs optimally and sustainably. Robert holds a Bachelor of Science Honours degree in genetics. Prior to joining I&J he worked in the aquaculture industry, helping to pioneer the culture of ornamental fish and prawns in South Africa. He has in the past chaired the Marine Fish Farming Association of South Africa, the Abalone Farmers Association of South Africa and Aquaculture SA, an umbrella association that represents organised aquaculture in South Africa.

Natasha Diest

Natasha Diest is financial director at Impala Fishing, a company started by her grandfather, Harry Cottle, in 1994. She began working for the family business in 2003 after graduating with a Bachelor of Commerce degree from the University of Cape Town, followed by a six-month internship at the international seafood trading company Interpral SA in Paris, France. Natasha completed an MBA at the UCT Graduate School of Business in 2016 and participated in the Global Network for Advanced Management programme at the prestigious Yale School of Management in the same year.

Ina Botha

Ina Botha is managing director of the Oceana Group’s wild-caught division, Blue Continent Products. Ina joined Oceana in 2017 as the supply chain director of Commercial Cold Storage and was appointed executive director in 2018. Prior to this she was the regional operations executive at Vector Logistics (a division of RCL Foods) and held positions at the Cold Chain Bloemfontein (a division of ICS Group) and EY. At the helm of BCP, Ina has worked to future-proof the business by focusing investment on the fleet, systems and people to drive operational efficiencies and global customer relations.

Roger Coppin

Roger Coppin is managing director of two of fast moving consumer goods producer, AVI’s business units: I&J and AVI International. He represents the interests of I&J on the SADSTIA Executive Committee which he joined in April 2024. Roger has worked for AVI since 2000 and in that time he has managed businesses right across the AVI portfolio of brands, from the Real Juice Company to the leading personal care brands Yardley and Lenthéric, housed in the business unit Indigo Cosmetics.

Bonga Mavume

Bonga Mavume is founder and managing director of the Nalitha Fishing Group. He has over 20 years of executive managerial experience in the food manufacturing and agriculture industry. Bonga started his career in Pioneer Foods’ Agriculture and Baking Division in 1997 before moving to RCL Foods, Rainbow Chicken and later to the Baking Divison of RCL. He also spent two years with the Oceana Group before founding Nalitha Fishing Group in 2017. Bonga holds a Bachelor of Science degree in Agriculture (Honours) and a master’s degree in business administration.

Pheobius Mullins

Pheobius Mullins is chief operating officer of the Basani Group. He plays a very active role in the management and regulation of the fishing industry as a whole, serving as vice chair of the South African Fishing Industry Employers Organisation and chair of the Pole and Line Chamber at the South African Tuna Association. Pheobius holds a National Diploma in Oceanography from the Cape Peninsula University of Technology and worked as a research technician in the Department of Environment, Forestry and Fisheries for 20 years before taking up a position within the fishing industry.

Felix Ratheb

Felix Ratheb joined Sea Harvest as a commercial manager in 2003, was promoted to group sales & marketing director in 2006, and group CEO in 2013. He has represented Sea Harvest at SADSTIA since 2013 and served as a trustee on the board of the Marine Stewardship Council from 2016 to 2019. He is also the chairman of the Groundfish Forum, the largest whitefish conference in the world, which is headquartered in Canada. Felix holds a Bachelor of Science degree in Electrical Engineering and an MBA.

Tim Reddell

Tim Reddell manages Sea Harvest’s Viking Fishing Division. Between 2000 and 2017, Tim served eight terms as chairman of SADSTIA. In 2011, he was instrumental in establishing FishSA, an umbrella body that represents 11 fisheries sectors in South Africa. Tim holds a Bachelor of Science degree in Industrial Engineering from Stellenbosch University and worked for I&J for 18 years, leaving the company in 2003 to start his own fishing business. In 2004 he was appointed a director of Viking Fishing. In 2018, following the sale of Viking Fishing to a consortium led by Sea Harvest, he was appointed to his current position.

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