overfishing
From Longman Dictionary of Contemporary Englishoverfishingo‧ver‧fish‧ing /ˌəʊvəˈfɪʃɪŋ $ ˌoʊvər-/ noun [uncountable] the process of taking too many fish from the sea, a river etc, so that the number of fish in it becomes too lowExamples from the Corpusoverfishing• Habitat destruction and overfishing have also taken their toll.• The overfishing of herring and other fish has caused problems for bird species dependent on these stocks, particularly in wintertime.• He rejected claims by environmentalists that drift nets led to overfishing.