Since 2003, a stratified random summer bottom trawl survey was conducted by Spain in the NAFO Regulatory Area of Division 3L (Flemish Pass). The surveys were carried out by the R/V “Vizconde de Eza” using bottom trawl net type Campelen. Entire series of mean catches, biomass and length distribution for Greenland halibut, American plaice and witch flounder are presented for the period 2003-2013. Greenland halibut biomass and abundance estimates show an increasing trend along the whole period, reaching a maximum of mean catch and number in 2008. A great increase of small individuals (around 12-15 cm) can be seen in 2013. American plaice biomass and abundance estimates present an increasing trend since 2010. Regarding witch flounder, the biomass and abundance increased in 2013, but there is no a clear trend in the whole period 2003-2013.