Fiu Tui (born 11 December 1988)[1] is a Tuvaluan boxer who has represented Tuvalu at the Commonwealth Games and Pacific Games.

[2] In 2009 he was one of eleven Tuvaluan sailors held hostage by Somali pirates aboard the MV Hansa Stavanger.

[3] He won a bronze medal in the middleweight class at the 2019 Pacific Games in Apia.

[4] In 2022 he was selected as part of Tuvalu's team for the 2022 Commonwealth Games in Birmingham, England.

[5] He used the platform of the Commonwealth games to advocate for stronger action on climate change.