Sepia is a variety of this 3-letter defensive secretion produced by cephalopods
Thus, 
although the symbiotic organ peroxidase and human MPO migrate... [DOC] [TLE] Therapeutic effect of Sepia ink extract against ... - ScienceDirect [PAR] The ink secretion of molluscan species was identified as one of the novel sources 
of ... Aspergillosis refers to the spectrum of diseases caused by Aspergillus ...