Vodorosli
From sciforums_encyclopedia
Are Russian river algae, known for their green color and water/river cleaning properties. Swimming past the algae, deep down the river one wishes to find the end to the never ending beautiful algae, yet seen no end to it all, and wishes not to go further as there is no more oxygen left in the lungs.
http://www.lzmk.lv/galeri/11_vodorosli.jpg
cite: http://www.lzmk.lv/galeri_8.html
Trivia
Russian river algae are not algae.