Correct! The poison arrow frog has the most poisonous compound of any living organism. Poison arrow frogs store toxic defensive compounds such as batrachotoxin, in the skin; these compounds have been shown to have distinctive effects on the nervous and muscle systems. Secretions of the poison arrow frog were known by Native Americans and were used for hunting; the chemicals of the frog were collected and applied to arrowheads, so as to ensure death upon piercing.