The following report details the findings of the 2012 adult and juvenile fish characterisation surveys, undertaken within and adjacent to Tranche B of the planned Dogger Bank offshore wind farm and along the proposed export cable. 3 Surveys were undertaken April/May 2012, July 2012 and October 2012. The survey methodology, vessel and sampling gear detailed were agreed in consultation with Cefas and the Marine Management Organisation (MMO). A dispensation from the MMO for the Provisions of Council Regulation 850/98 to catch and retain undersize fish for scientific research and 43/2009 specifically related to days at sea was obtained prior to commencement of this survey. The aim of the survey was to establish the abundance and composition of adult and juvenile fishspecies within the area of the Dogger Bank. It should be noted that P. platessa, Ammodytidae sp., G. morhua, M. merlangus and C. harengus have been defined as species of importance in the area. This series contains 3 individual reports (1 for each survey period) and GIS shapefiles.