Snake

Snakes are seemingly the best choice for a vore scene. Long slender bodies, the natural ability to stretch five times their own size, and other reasons seem to make them one of the most common or modified creatures in real life and in fiction. Not only such, but they are cool otherwise.

While most species of snake prefer to kill their prey with the use of venom or constriction. However, some species are known to favor much smaller prey, and are thus able to devour ther meals whole and alive. For those wanting inspiration, a super-sized version of that particular sort of snake would allow a more realistic take on this classic predator. Or course, having your giant constrictor simply squeeze your prey into unconsciousness, or having your large viper rely on a less potent paralytic toxin, can still work just as well in any work involving this powerful animal.