NWO-NIOZ Royal Netherlands Institute for Sea Research is the national oceanographic institute of the Netherlands and principally performs multidisciplinary fundamental and frontier applied marine research addressing important scientific and societal questions pertinent to the functioning of oceans and seas.

The department of estuarine and delta systems is located in Yerseke (the Netherlands).

The NIOZ is part of STICHTING NEDERLANDSE WETENSCHAPPELIJK ONDERZOEK INSTITUTEN (PIC: 999624092)