Tenararo is the smallest atoll in the Acteon Group in the southeastern part of the Tuamotu Islands in French Polynesia.

The first recorded sighting of this atoll was made during the Spanish expedition of the Portuguese navigator Pedro Fernández de Quirós on 5 February 1606 under the name Las Cuatro Coronadas (the "four crowned" (by coconut palms)),[2][3] however these observations were not fully documented.

As such, the first unambiguous approach to the island was made on 14 March 1828 by the explorer Hugh Cuming in his ship the Discoverer captained by Samuel Grimwood.

The next visit was in 1833 by navigator Thomas Ebrill on his merchant vessel Amphitrite and again in 1837 by Lord Edward Russell, commander of the H.M.S Actaeon, the name given to the group.

[7] The atoll is free of introduced mammalian predators, making it an essential conservational habitat.