While I was underwater in Lake Geneva looking for catfish, this great crested grebe unexpectedly appeared, probably looking for a fish. He was a little startled by this strange thing in the water, stopped, and then quickly disappeared.

Morgen Mittwoch um 19:30 h halte ich in Biel im Farelhaus den Vortrag «Vom Amazonas an die Aare», Informationen unter farelhaus.ch/de/veranstaltu…

For half a year, Michel Roggo photographed and filmed in Lake Geneva and its tributaries, always underwater. A rich selection of images and films can now be seen in the exhibition “Michel Roggo dans les eaux du Léman”: maisondelariviere.ch/centre-nature-…

The Swiss television RTS reports on my current exhibition “Michel Roggo dans les eaux du Léman” (in French): rts.ch/play/tv/19h30/…

A story about my work in Lake Geneva in the Swiss magazine 24 heures (text in French, but the pictures don't require any language skills;) 24heures.ch/exposition-imm…

Curious what it's like to float through clouds of plankton in the depths of a lake? And to see perch feeding on it? Then take a look!

Is this what Europe's lakes will look like in the future? I took this picture a few days ago in Lake Geneva in Switzerland. All the rock faces are completely covered by Quagga mussels. They suffocate all life - a truly apocalyptic picture.

Post on the Swiss television SRF Instagram page about my work as a photographer: instagram.com/p/DCJG3JOPQ4L/

I recently returned to Lake Geneva to photograph quagga mussels, this time using a macro lens. The pictures show how densely the mussels cover everything. The consequences for all other life forms in the lake are likely to be dramatic.

New images of quagga mussels in Lake Geneva. The incoming siphon, through which water and food are sucked in, is visible, as is the elongated outgoing siphon that expels water and unusable material. The colors of the rainbow are caused by the refraction of light at the waves.

Yesterday I was a guest on Swiss TV Canal Alpha to talk about my work as a photographer, especially about the 3 Lakes project, and thus also about Lake Neuchâtel (in French): canalalpha.ch/play/la-boucle…

Article in the web magazine “Die Umwelt” about quagga mussels in Swiss lakes, featuring my photos and videos: dieumwelt.ch/artikel/so-ver…

I photographed yesterday in Lake Thun. Although I was looking for coregonids (Coregonus sp.), the most impressive thing was the dense mass of plankton at a depth of 50 meters. Plankton, consisting of phytoplankton and zooplankton, is an important food sources for Coregonids.

This is probably what the winegrowing village of Rivaz on Lake Geneva looks like when viewed from the surface by a fish. At least, that's what it looked like through my underwater camera when I resurfaced.

Occasionally, one hears that there are no more fish in Lake Geneva. Well, I was out taking photographs recently and found this school of perch. After spending the cold winter months in the depths of the lake, the perch now rise in huge schools to the upper layers of the water.

A landscape in a distant galaxy? No, quagga mussels 70 meters below the surface of Lake Geneva, in eternal darkness! And what looks like a starry sky is plankton glowing in the light of the lamps. A picture of beguiling beauty, so close and yet so alien.

At a depth of 70 meters in Lake Geneva, dense clouds of plankton form images that could be mistaken for a distant galaxy. The yellowish color is caused by the light-colored sand at the bottom of the lake.

Today's Bing Wallpaper Gallery “Image of the Day” is one of my pictures from Rainbow River, Rainbow Spring State Park, Florida. I took it in 2012 for my Freshwater Project. See bing.gifposter.com/wallpaper-3296…

In Lake Geneva, the Perch (Perca fluviatilis) stay directly above the layer of plankton, at a depth of around 10 meters. Visibility is good there and imminent danger can be detected. To feed, they then go down into the plankton layer, where they feed on zooplankton.

After spending a long time photographing large schools of perch in Lake Geneva, I moved on to Lake Neuchâtel. Once again, I was photographing perch, but this time in the plant belt along the shore. What a different and almost idyllic setting!