A little opportunistic small parasite, the Fleshfinder
It uses most of his energy to climbs on a cliff or a high kind of plant and waits there for a large creature to move nearby. It then let itself falling on it. A miss is usually the death of the Fleshfinder that will not have enough energy left to get back into position.
Once it landed on a creature, with its 2 forward appendices that act as some plunger device it attaches itself to the target. It then proceed to pierce a hole in the carapace of the host with its jaw and then move inside the orifice. There it eats the flesh and once it has enough nutrients, it lay eggs and dies.
It's quite some time that I don't post anything, so here's my entry: "arachnozales" (don't ask about the name... ). It has been able to adapt to the absence of a strong heat source storing energy in its (usually glowing) back to maintain its body temperature and, in case of need, releasing it to amplify the perforating ability of its sharp legs. With two extra blades, a strong shell and a mane on it's upper extension it can be an intimidating and dangerous foe. Anyway it's usually a non-violent specimen, except when it comes to protect it's territory or its eggs.