Parasitic wasp larvae hatching from inside the living caterpillar host. The
female wasp will oviposit into the host’s body. The larvae will feed
inside the host until they are ready to pupate. Quite often the host is
dead by that point but if not, then the parasitoid will often eat its
way out of the host.

The mantis shrimp “spearing” the
head of a fish. Mantis shrimp wait for fish to swim near their burrow
and then strike with their claws and drag them into their burrows. Their
strikes are so strong that they have been known to smash aquarium