Would you dip your toe in the water with these little monsters?

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These are red-bellied piranhas - not my own photo I hasten to add! The reputation of piranhas is that they can shred any animal to bones in less than a minute, but the fact is that piranhas are actually scared of most animals, including humans. They usually eat dead animals, for which their sharp teeth are particularly useful. We have Hollywood and myth to thank for exaggerating their supposed frenzies, examples of which are extremely rare.