Observations on Navicula spec.

Sampling date 04/2010. Scale bars indicate 200 µm (1) and 100 µm (2).

Two images.
First:      Navicula spec. in mucilaginous sheath accompanied by the green alga Ulothrix carmichaelii.
Second: Magnified view of the gelatinous tube of the diatoms.

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Place name: North Sea around Heligoland
Latitude: 54.186311     Longitude: 7.895034

Microscope Zeiss Universal, camera  Olympus C7070WZ. DOF image.