This protist was collected during the day at Mueller pond.
This Colepidae had a lot of movement and looks like from the dark color is from the feeding.
In a sample of water from Töölö Bay, Baltic Sea
Video: https://youtu.be/PAkg6twoqbg
Photos are snapshots of the same individual featured in the video
Size: 81 µm in length (excluding cirri)
Site of sample collection: A stream full of algae near the South Pond, Katsurashima Ryokuchi (a freshwater habitat), Sendai, Japan
Date of sample collection: August 27th, 2022
Weather: Cloudy
Water temp.: 25.4°C
pH 7.0
Date of observation: August 28th, 2022 (the collected sample in a plastic container was left near a window out of direct sunlight at room temperature until observation)
Bright-field observation using a Wraymer microscope (model BX-3500TL, Osaka, Japan) equipped with a Floyd-2 HDMI ethernet digital camera (Wraymer, Osaka, Japan). The accuracy of the scale bar was confirmed by using a stage micrometer glass slide (1 div. = 10 µm; Wraymer, Osaka, Japan) at each magnification.
Sunlit water extract from garden soil.
Periphyton from an abandoned phosphate ore quarry: pH = 5,1; Сm(NO₃⁻) ~ 170 ppm.