Danish seine target demersal species. The seines consists basically of a conical netting body, two relatively long wings and a bag. An important component for the capture efficiency of boat seines is the long ropes extending from the wings, which are used to encircle a large area. Many seine nets are very similar in design to trawl nets. Frequently, however, the wings are longer than on trawl nets.
The main potential negative impact of Danish seining on living resources is when too many small sized organisms and non-target species are caught and sometimes discarded. Such impact can be mitigated by using larger meshes in the bag and/or specific devices being installed on the seine for reducing the capture of small and unwanted organisms.
Source: FAO site, 2017