Outflow from tropical reef ID help please

I'm in the Solomon Islands (Marau Lagoon, Guadalcanal) and going to treck to:

maps.apple.com/?lsp=7618&q=-9.890595,160.785677&sll=-9.890595,160.785677

tomorrow to snorkle and see what it is making this yellow shape.
i can see it as an identicle appearance on two different satellite images. 
What do you think it might be?
greg

Decimal lat long is -9.890595,160.785677

Sept 5, 2015 9:52:28 GMT gregyael said:

I'm in the Solomon Islands (Marau Lagoon, Guadalcanal) and going to treck to:

maps.apple.com/?lsp=7618&q=-9.890595,160.785677&sll=-9.890595,160.785677

tomorrow to snorkle and see what it is making this yellow shape.
i can see it as an identicle appearance on two different satellite images. 
What do you think it might be?
greg

Decimal lat long is -9.890595,160.785677

Hi There

Are you on holiday there

You are best to get advise from a Local source..  As you say the 'Outflow' does show in Historical images since 2006.

Currents look quite strong as well -

It looks like a sandbar to me. As Norm wrote, it is in existence at least from as long ago as 2006 if you check it out with historical imagery.

Bump