The Moorish idols are defenceless against hundreds of sharks

It's just chaos up there. #DavidAttenborough #MoorishIdols #Sharks #Nature #NaturalWorld #Asia #BBCAsia Moorish Idols congregate in huge numbers, swimming away from the reef to spawn. As they do, they attract the attention of hundreds of grey reef sharks. A brutal battle ensues, and its survival of the fittest. Subscribe and ???? to the BBC ???? https://bit.ly/BBCYouTubeSub Watch the BBC first on iPlayer ???? https://bbc.in/iPlayer-Home All our TV channels and S4C are available to watch live through BBC iPlayer, although some programmes may not be available to stream online due to rights. If you would like to read more on what types of programmes are available to watch live, check the 'Are all programmes that are broadcast available on BBC iPlayer?' FAQ ???? https://bbc.in/2m8ks6v.