The zbleb is a creature living in marine environments and especially at the edge of oceans or seas. It consists of a mass of pink flesh topped by two bulging eyes that appear in undetermined places on the zbleb's body. They are small and can take on any shape, always resembling a jelly without a specific shape.  The zbleb has only one ability, that of not being able to be damaged by whatever the first attack made against it during a fight. This ability is mostly coveted by more intelligent marine creatures who stick zbleb on sensitive areas of their skin to better protect themselves from their opponents. But the ability of zbleb to be stretched almost without limit also makes them useful to soldiers who would like to stick them on their armors and shields, even if to this day no one has yet managed to understand either where this ability comes from or how to get hold of it without having to deal with these sticky gelatins. Their reproductive system is very simple. A Zbleb is born by growing in a random place on the body of the child-bearing Zbleb. Zblebs are also known for their pestering odor, which becomes even stronger when they are killed.