The existence of ectoplasm is a controversial topic.
The ectoplasm would supposedly flow out of the medium's mouth or nose.
Skeptics believe that ectoplasm is nothing more than a prop used in scams perpetrated by charlatans who portrayed themselves as mediums during the Victorian era up until the late 1930s.
Ectoplasm is a word often used to describe a gel-like residue reportedly found at the site of an apparition or paranormal event.
Samples of so-called ectoplasm have been analyzed and identified as various substances that are quite human and common.
Under this scenario, the ectoplasm would be left behind after the entity returned to non-corporal form.
Many people mistakenly refer to vaporous shapes or trails of fog-like mist as ectoplasm.
The spirit would then use the ectoplasm to physically manifest.
It is sometimes differentiated into a clearer outer layer, of hyaloplasm, commonly called the ectoplasm, and an inner granular endoplasm.