Organotin levels in Nazaré canyon (west Iberian Margin, NE Atlantic) and adjacent coastal area

► OTs were quantified for the first time in the upper flanks of the Nazaré canyon. ► Levels are lower than the ones reported for other offshore and deep sea areas. ► OTs levels are lower in the canyon and higher in the adjacent coastal area. ► The reported levels are higher than the EAC set for TBT in sediments.