The Hapan Water Dragon, also known as a Wavespeeder, was an ocean transport used by the Hapan royal family. It was capable of traveling across the ocean at top speeds.
In 23 ABY, the young Jedi trainee and heir to the Hapan throne, Tenel Ka Djo, along with her grandmother Queen Mother Ta'a Chume and her Jedi companions used a Water Dragon to travel in the oceans of Hapes.
Unfortunately, the treacherous Ambassador Yfra arranged for the vehicle to be blown up. However, Tenel Ka, the Queen Mother and their Force-sensitive companions survived the attack. They would also survive a patch of carnivorous seaweed which had been planted nearby by Yfra.