freshwater mussel shell (anodonta cygnea) with remnants of algae on a green background.

algae animal biodiversity blue brown closeup cockleshell color colorful copy space daylight freshwater mollusk fujixt2 grass great green green background horizontal isolated limestone macro meadow muscle-fish mussel shell nature one open orange outdoor outside pattern pearl layer plant postcard reflection shellfish shine side view spring summer sunlight texture white wildlife wooden surface yellow