Duiken 2020 : 20200617 : 20200617-R180-Chara-kranswier-plasKatwijk

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20200617-R178-Elodia-nutallii-Smalle-waterpest-plant-plasKatwijk

20200617-R181-Potamogeton-crispus-Gekroesd-fontijnkruid-plant-plasKatwijk



20200617-R178-Elodia-nutallii-Smalle-waterpest-plant-plasKatwijk

20200617-R181-Potamogeton-crispus-Gekroesd-fontijnkruid-plant-plasKatwijk