Originally it was a reef island, made up of two close standing parts.

The total population of the Reef Islands is about 5,600 according to 2003 estimates.

There are several reef islands in close proximity to Ukupseni.

Niutao is a reef island in the northern part of Tuvalu.

It comprises three reef islands and six true atolls spread out from 6 to 10 south.

Nukuteatea - a low reef island about 1 mi.

Tuvalu consists of three reef islands and six true atolls.

It comprises four reef islands and five true atolls.

Tuvalu has four reef islands and five true atolls.

One of them is, or used to be, out on one of the reef islands, Apu.