context: Laying, poisonous, fluffy, and mammalian in appearance and beaver-toe [2] [3] mammals have confused European zoologists, many of whom at first encounter thought it was a well-planned scam. It is one of the few toxic mammals: the male of the bivalve mammal has a hind foot spur that spreads poison that causes severe pain to humans. Because of its unique characteristics, the amphibian is an important study in evolutionary biology and an easily recognizable symbol of Australia. It has been used as a mascot for many national events and is depicted on the reverse of the Australian 20 cent coin.
question: Where does the octopus excrete poison?
answers.text: hind foot