Wellerman is a traditional New Zealand sea shanty from the nineteenth-century whaling era, when crews waited for supply ships known as wellermen to bring provisions. It stayed a folk standard for decades before Scottish singer Nathan Evans posted his a cappella version on TikTok in late 2020, sparking a wave of duets and harmonies that turned sea shanties into a global trend in early 2021. The simple chorus and singalong structure keep it popular for ocean content, memes and group singalongs long after the trend peaked.