Hi guys, your opinion please on this scum from a bathing spot in the Netherlands. It started to float in midafternoon in spots on the surface, as a very loose light green-greyish layer. (https://www.mikroskopie-forum.de/pictures005/199141_30006154.jpg)
It consists of small densely packed globules in an envelope, roughly 50 um in diameter.
(https://www.mikroskopie-forum.de/pictures005/199141_8099692.jpg)
Flattened it looks like this (same slide, nearly dry):
(https://www.mikroskopie-forum.de/pictures005/199141_28941829.jpg)
Look at the left one! Parasitism?
(https://www.mikroskopie-forum.de/pictures005/199141_27313896.jpg)
Sometimes these cysts got very big. Rotifer?
(https://www.mikroskopie-forum.de/pictures005/199141_21165770.jpg)
And what's going on here?
(https://www.mikroskopie-forum.de/pictures005/199141_12935559.jpg)
Thanks for comments,
René
Got a link from amoebe-expert Ferry Siemensma with a similar organism detected in Japan: http://www.wakasagi.jpn.org/js-news06-20130807o-02.htm. It might be an Anabaena-feeding amoebe from the genus Asterocaelum.
Best wishes, René