“Can tapeworms live on walls?” is all Robin asks in her submission regarding the yellow object in the photo. To begin with, we have to point out that we are not qualified or legally able to identify tapeworms, because they are parasites. Only a medical professional is legally able to identify parasites, or any other organism that directly affect the health of people or pets, because that identification is tantamount to a diagnosis: it dictates what types of treatments and/or medications a human/animal might need as a result of finding that parasite. Now, we realize that Robin did not ask us to identify a tapeworm: she only asks if they can live on walls. But the photo is somewhat confusing, as it does not seem to show a tapeworm, or any organism for that matter, so we do not know its purpose.