Blob

From Vore Wiki

This is a type of predator that is essentially a blob or a slime. It has no perceivable organs and may be transparent or opaque. It may have a mouth but usually engulfs the person with their body. This prey may then remain inside the slime for as long as the slime desires. The prey could either be suffocated to death or digested. This type of predator usually appears not only in stories related to Voreaphilia but also Endosomotophilia.