Johan Groeneveld is a senior marine scientist at the Oceanographic Research Institute in Durban, South Africa, and an honorary professor at the University of KwaZulu-Natal. He completed a PhD on the ecology and fisheries for spiny lobsters at the University of Cape Town in 2001. He has spent most of his professional career working on the impacts of fisheries on fish stocks and the marine environment in Western Indian Ocean countries, from South Africa in the south to the Sultanate of Oman and Arabian Sea in the north. He has participated in several multi-national collaborative projects across the region, often as the principal investigator, and as mentor to post-graduate students and young scientists. Recent research interests include socio-ecology of small-scale fisheries in estuaries in Mozambique, Tanzania and Kenya (see www.estuarize.org); genetic connectivity and dispersal patterns of lobster larvae by ocean currents; metabarcoding of bulk zooplankton samples caught in plankton tows; and shark bycatches of pelagic longline fisheries. Johan is a frequent assessor / peer-reviewer of fisheries entering the Marine Stewardship Council certification scheme. He has published widely in the peer-reviewed literature, and is on the editorial boards of both Fisheries Research and the Western Indian Ocean Journal of Marine Science.