Developments in benthos and fish in gullies in an area closed for human use in the Wadden Sea This WOt-technical report was produced in accordance with the Quality Management System of the Statutory Research Tasks Unit for Nature & the Environment, part of Wageningen University & Research. The mission of the Statutory Research Tasks Unit for Nature and the Environment (WOT Natuur & Milieu) is to carry out statutory research tasks on issues relating to nature and the environment. These tasks are implemented in order to support the Dutch Minister of Agriculture, Nature and Food Quality, who is responsible for these issues. We provide data about agri-environment, biodiversity and soil information to compile reports as part of national and international obligations, and we work on products of the PBL Netherlands Environmental Assessment Agency, such as the Assessment of the Human Environment reports. Disclaimer WOt-publicaties The 'WOt-technical reports' series presents the findings of research projects implemented for the Statutory Research Tasks Unit for Nature & the Environment by various centres of expertise. WOt-technical report 129 presents the findings of a research project commissioned and funded by the Dutch Ministry of Agriculture, Nature and Food Quality (LNV). The project was carried out by Wageningen Marine Research (WMR). Wageningen Marine Research utilises an ISO 9001:2015 certified quality management system. This certificate is valid until 15 December 2021. The organisation has been certified since 27 February 2001. The certification was issued by DNV GL. Developments in benthos and fish in gullies in an area closed for human use in the Wadden Sea