A mucous covering produced nocturnally by some fish that is used to envelope the whole animal. [ http://www.ncbi.nlm.nih.gov/pubmed/21084337 ]
This is just here as a test because I lose it
A mucous covering produced nocturnally by some fish that is used to envelope the whole animal. [ http://www.ncbi.nlm.nih.gov/pubmed/21084337 ]