Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
In Australia, there are spiders big enough to eat snakes.
20
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7