Thanks, this is another worm. I found some of them against the side of the sample jar. I've never seen it eat but you can see a big desmid inside of the body. It was a bit difficult to photograph the trunk because it was constantly sweeping.
Byomic BYO500T microscope /CIOC XDS-1 invert.
Byomic ST-340 stereomicroscope
Olympus BHM Metallurgical Microscope
Canon EOS 7D Mark II / Canon MP-E65
Cognisys StackShot www.ngvm.nl