Many strollers on the beach have already seen them at work: the hand trawlers. About two hours before the tide is out, they are drawn to the sea, equiped with waterproof clothing and a hand trawling net and hoping for a good shrimp catch. Almost three hours later, they come back onto the beach to sort out their catches. During this process, they can always count on a number of curious glimpses and questions of the people walking by. Some of these hand trawlers don't just take home their freshly caught shrimp, but they also record their catches very accurately. Although brown shrimp are the main target of this fishing activity, the rest of the marine organisms captured in the net is also written down (e.g. the number of sole, crabs, jelly fish and weevers). These catch data on hand trawling are an important source of information and the Flanders Marine Institute (VLIZ) wants to prevent these data from getting lost. That is why VLIZ has taken the initiative to contact hand trawler along the Belgian coast and inform them on the importance of keeping track of their catches when they go out trawling. The Flanders Marine Institute closely wants to collaborate with hand trawlers, angler fishers and other recreational fishers to describe and archive all their knowledge and information on catches. This way, the data can be safeguarded for the future and they can maybe even contribute to long-term investigations on the occurrence of the brown shrimp in the Belgian coastal zone.