The orange roughy (Hoplostethus atlanticus) is found in the North and South Atlantic, in the Southern Indian Ocean, the Tasman Sea, around New Zealand, and in the South Pacific. The species is caught on fish aggregations associated with seamounts. Some are straddling stocks, while others are entirely on the high seas. There is a lack of information on the possible seasonal migrations and stock structure of Orange roughy in the Southern Indian ocean. No global stock assessment has been located but FAO recommended that managers initially assume that each major isolated geographical feature on which a fishery occurs, pertains to an individual stock unit (FAO, 2002; Maguire et al., 2006). SIOFA considers several managemet units for orange roughy within the SIOFA area and has performed stock assessments on some of those area in recent years (SIOFA 2022).