Nematode matricide, evolution of ageing, and offspring-mother conflicts

Let's start with one death. Pristionchus pacificus eating a Caenorhabditis elegans.

Pristionchus pacificus is a nematode that can eat many kinds of foods. In this video, it uses a small tooth to puncture the cuticle of its prey, then sucks in the contents.

The Celens (imma call C elegans that) come in two sexes: male and herm. Herms contain only about 300 sperm cells, after using them all, the herm cannot fertilize more eggs, unless it gathers more from mating with a male. Males cannot reproduce on their own and must mate with a herm to produce offsprings.