Some river algae on the Gromolo stream.
I really like this image of some algae but at the same time it worries me a bit. The river is the Gromolo and this strange formation was in a waterfall towards Santa Vittoria di Libiola.
Will it all be natural? I don't know…

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Algae (from the Latin Algae) belong to a grouping, not belonging to a systematic taxon, represented by organisms of animal structure, autotrophic, unicellular or multicellular, which produce chemical energy by photosynthesis, generating oxygen and which do not present a differentiation into true tissues. Over time, and in the evolution of the scientific systematization of living beings, within this grouping different systematic groups have come to be found with congruent characteristics such as a very simple structure and not differentiated into tissues and very often the photosynthetic capacity. The only green algae or chlorophytes, together with the embryophytes, or terrestrial plants, constitute the clade of green plants, or viridiplantae.
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Some river algae on the Gromolo stream – Quelques algues de rivière sur le ruisseau Gromolo – Algunas algas de río en el arroyo Gromolo – Algumas algas fluviais no riacho Gromolo – Einige Flussalgen am Gromolo-Bach – Một số loài tảo sông trên suối Gromolo