Many Australians will be "pushing up daisies" when some of the nation's newest Galapagos tortoise hit their prime.
Two hatchlings, born at Dubbo's Taronga Western Plains Zoo in January, were officially announced on Wednesday.
Galapagos tortoise supervisor Jennifer Conaghan told AAP the hatchlings would take 25 years to mature and could live for 150 years.
"When we're all pushing up daisies, they'll be hitting their prime," she said.
She also said the hatchlings were exact replicas of adults despite being born more than 3000 times smaller than their father.
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"Their shell formation ... their legs, claws, everything is the same," she told AAP.
Keepers won't be able to determine their sex until they're around five.
They're too small to join the adult enclosure for now so the youngsters are living it up in an artificially created tropical climate.
They'll join a three-year-old hatchling, the first to be born in Australia, in 18 months' time.
Galapagos Tortoises are considered vulnerable in the wild, with 10,000 thought to remain in the Galapagos Archipelago.
