Historically, Acadian redfish in the Gulf of St. Lawrence (Unit 1) and the Laurentian Channel (Unit 2) were assessed separately but from 2010 a single assessment was conducted following evidence that fish from these two units belong to the same biological stock. However, uncertainty remains over mixing with adjacent units (Valentin et al. 2005). Detailed genetic studies have shown a complex sub-stock structure for this species, with components often referred to as ecotypes (Benestan et al. 2021)(Valentin et al. 2014). Units 1 and 2 are two of nine NW Atlantic redfish management areas and Unit 1 and Unit 2 Acadian redfish remain assessed and managed as a single stock.