Chelsea owner Roman Abramovich no longer has the biggest yacht in the harbour following the purchase of the Azzam by Manchester City owner's half-brother.
Sheik Khalifa bin Zayed bin Sultan al-Nahyan is said to have paid £390m for the yacht, which has pushed Abramovich's Eclipse from the top spot.
It has been revealed by Yachts France that the Emir of Abu Dhabi's yacht is 54ft longer than Eclipse, which has been the largest for three years, according to the Daily Mail.
Azzam is longer than 12 double-decker buses.