Chinese giant salamanders secrete sticky mucus and it can be used as glue to close wounds after surgery more effectively than artificial adhesives
Source:
https://www.newscientist.com/article/2205461-oozing-white-mucus-from-giant-salamanders-makes-excellent-medical-glue/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home