Christmas Island

Fish that have lost food due to mass coral bleaching are getting into more unnecessary fights, causing them to expend precious energy and potentially threatening their survival, new research said on Jan 3.

With the future of the world's coral reefs threatened by climate change, a team of researchers studied how a mass bleaching event affected 38 species of butterflyfish.

A powerful and shallow 7.9 magnitude earthquake struck off the west coast of the Indonesian island of Sumatra, according to US Geological Survey.

The epicentre was 502 miles southwest of Padang and it was 10 km deep. Up to now, there were no reports of damage or casualties.

Indonesian authorities issued a tsunami warning for the regions of West Sumatra, North Sumatra and Aceh.