In the first clip, we see a nematode egg. At this stage, we can’t identify the exact type — it’s too early to tell just by its shape. In the second video, we get a closer look at the mouthpart — and this is where the detective work begins! We can often recognize bacterial feeders by their fancy lips, which is the case in this nematode. But sometimes we don’t see fancy lips. And if we are able to see only the head part of the nematode, we can use elimination to narrow it down: Does it have a spea