66. What “stone” can kill you if you step on it?

OVER 50 DIFFERENT KINDS OF POISONOUS FISH LURK IN THE WORLD’S OCEANS. Some are armed with venomous spines, others have poisonous flesh. The stonefish, of Australian waters, is one of the deadliest of all sea creatures. If a person treads on the fish, its spines release a toxin (poison) that causes agonizing pain. Numbness spreads through the victim’s body, and they may die of shock, heart failure, or breathing problems.