He spoke about the devastation of the king tides in February, that washed through the remote Pacific island of Kiribati.
"90% of Kiribati is under five metres high and the king tides reached a max of three metres," he said. "There's just nowhere for them to go."
"Our coordinator in Kiribati told us that he gathered his family in the living room, took some rope, tied them together and they prayed, because if the waves took them away they would go together."
Sikulu said that he was bitterly disappointed at Australia's commitment at COP21 so far.
"We're so, so disappointed," he said. "They're going to decide whats being put in place for the next twenty years and in the first meeting they committed to practically nothing."