The bigeye thresher shark, Alopias superciliosus, is confirmed for the first time in Namibian waters, from four specimens caught as bycatch of bottom trawlers fishing for hake. One specimen was released alive; the other three were dead when brought on board and were utilised by crew members. This species has not previously been documented in Namibia and these records complete the gap in the species’ range, between Angola and South Africa. Keywords: Bigeye thresher shark, Atlantic Ocean, pelagic, bycatch, bottom trawling, fisheries.