I’m by no means a biologist, so I apologize if this is a stupid question, but I don’t even know where to start looking online. As you can see in the images below, these protozoans (I think they’re protozoans?) are gathering (and eating, I presume) around something linear in my slide. The line seems to circle around the slide, but there are some spots with less organisms. Though I’ve seen these protozoans in my samples before, I’ve never seen them do this, so I’m a little confused. Anyone know what they’re doing?