"For us Saturn was an entire era, and that's without the slightest exaggeration".
Saturn was born in the USA around 1936, the zoo said, and shortly after was given to the Berlin Zoo as a gift. He escaped from the zoo when it was bombed in 1943, and was unaccounted for until 1946 when he was found by Russians.
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Many news agencies have incorrectly reported that Saturn was Hitler's personal alligator, but these myths have always been debunked.
The Moscow Zoo says it became an urban legend but doesn't elaborate on why something like that might've even been thought.
MS alligators usually live to 30-50 years in the wild, it added.
Saturn may have been the oldest alligator to have ever lived in captivity, though there is no way to be certain.
But it's doubtful any alligator could compete with Saturn if it came to selling their memoirs.
There is another alligator called Muja in Serbia who is also in his 80s and still going.
By the end of the war, less than 100 of the 3500 animals in the Berlin Zoo had survived thanks to Allied bombing campaigns.
It is unclear how the rumour started.
"Almost immediately, the myth was born that he was allegedly in the collection of Hitler and not in the Berlin Zoo", the zoo said in a statement.
But Saturn was a bit of an escape artist. On the night of 22-23 November, the Tiergarten district in Berlin was decimated, which was where the city's zoo was located.
The zoo's aquarium building took a direct hit.
Saturn someway survived after which lived for 3 years in a metropolis ravaged by battle, and a local weather unsuited to alligators.