Duiken 2020 : 20200312 : 20200312-R923-kruipspoor-Quaggamossel-plasKatwijk

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20200312-R922-Dreissena-rostriformis-bugensis-Quaggamossel-weekdier-plasKatwijk

20200312-R924-Dreissena-rostriformis-bugensis-Quaggamossel-weekdier-plasKatwijk



20200312-R922-Dreissena-rostriformis-bugensis-Quaggamossel-weekdier-plasKatwijk

20200312-R924-Dreissena-rostriformis-bugensis-Quaggamossel-weekdier-plasKatwijk