Irukandji Jellyfish (Malo kingi)
That tiny little white thing in the plastic container is a type of highly venomous jellyfish despite being no bigger than you thumbnail. Fully grown at 1 cubic centimetre it is able to fire its stingers into its victim, causing symptoms known as Irukandji syndrome; severe headache, backache, muscle pains, chest and abdominal pain, nausea and vomiting, sweating, anxiety, hypertension before causing heart attack. It is also commonly known to bring with it a sense of impending doom and knowledge that you will die. Apparently, patients have been so sure they were going to die they have asked doctors to just do it and get it over with. Gee, imagine why.