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A experimental fishing survey with Spanish commercial vessel was carried out in Subarea 1, inside the territorial waters of Greenland, from October to December 2003. The observer onboard collected data of catches by species, effort and position by haul and took length distribution samples of the following species: Reinhardtius hippoglossoides, Macrourus berglax, Gadus morhua, Pandalus borealis, Hippoglossoides platessoides and Sebastes spp. Biological sampling of Reinhardtius hippoglossoides, Gadus morhua, Hippoglossoides platessoides, Gadus ogac and Amblyraja radiata was done. Otoliths of Greenland halibut and Cod were also taken for age determination. During this experimental fishing 124 hauls were carried out with a bottom trawl gear (40 mm cod end) and 10 more hauls with a semipelagic trawl (40 mm cod end). The main catches were Greenland halibut (88%) and Northern prawn (6%) for the bottom trawl gear and Northern prawn (74%) for the pelagic one. Table 1 shows the catches by species and division and Table 3 presents the effort in hours by division and their percentage by gear and Division. Table 6 presents the total catches length distributions of redfish by Division and Table 14 shows the total catches length distribution by Divisions of Greenland halibut. Complete information about this experimental fishing is available in NAFO SCR Doc. 04/--SUBAREA 3 A. Status of the fisheries A total of 31 Spanish trawlers operated in NAFO Area, Div. 3LMNO, during 2003, amounting a fishing effort o