Worlds toughest creature: "The toughest creature on earth is likely one that you have never heard of, it’s called a Tardigrade, also commonly referred to as a water bear, or moss piglet. This creature is about .039 of an inch long full when full grown, it's small but tough. Tardigrades live in freshwater or saltwater, and in most other damp areas. You can in fact find them in almost any damp mossy area. Because of their size you will have to look close to see them, but they can be seen with some low level magnification and even the naked eye in perfect conditions."
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