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The dance of the weedy sea dragon takes place every year in the shallow seas off the coast of Australia. During the ghostly dance, two beautifully odd-looking fish mirror each other's every movement. At the end of the ritual, the male fish is the one to get pregnant, giving birth two months later.


 father mother courtship mating fish sea dragon Australia
Delaying fatherhood may offer survival advantages, say US scientists who have found children with older fathers and grandfathers appear to be "genetically programmed" to live longer.


 father child longevity genetics