Here's a couple more papers indicating how wide psread palytoxin might potentially be:
pubmed.ncbi.nlm.nih.gov
Palytoxin congeners - PubMed
Palytoxin, isolated from a zoanthid of the genus Palythoa, is the most potent marine toxin known. Intoxication by palytoxin leads to vasoconstriction, hemorrhage, ataxia, muscle weakness, ventricular fibrillation, pulmonary hypertension, ischemia and death. Palytoxin and its numerous derivatives...



