The Belgian MSFD monitoring programme ‘Commercial fish and shellfish’ aims at assessing the following ETs: • ET19 – All commercial fish stocks managed through the CFP are being managed in a way that minimally meets the maximum sustainable yield. This assessment should be performed on the basis of regional fish stocks, and not on a national level • ET20 – All commercial fish and shellfish stocks are within safe biological limits, with an age (when available) or size (if ages not available) distribution indicative for a healthy stock, and the stocks should be exploited on a stable, long term, with full reproductive capacity • ET21 – Shellfish stocks are being managed sustainably • ET22 – All commercial fish and shellfish stocks have complete reproductive capacity • ET23 – Fishing mortality values and spawning stock biomasses are within safe biological limits (F below or egual to reference points for fishery mortality; SSB above or equal to reference points for spawning stock biomass) or show positive of stable trends in survey abundance and negative or stable trends in survey CPU • ET24 – Stocks that are not within safe biological limits yet should at least show trends of movement in the direction of the reference points • ET25 – When data on a stock are even insufficient to evaluate trends in survey CPUE and abundance, these stocks will be placed in the category of data deficient stocks and discussions will be initiated regarding alternative evaluation methods. This category will be revised after each 6 years One sub-programme can be discerned: • ANSBE-D3 Commercial fish-SP13 (delivering data to assess ET19 to 25), targeting the fish stock assessment through the BTS and the DYFS surveys