Issue 245

Not just fish poo – why Macquarie Harbour has an oxygen problem

Scientists take a close look at what’s behind low-oxygen levels under salmon farms in Tasmania’s Macquarie Harbour.

Tracking the elusive whale sharks, the largest fish in the sea

They're elusive, whale sharks, so we're keeping an eye on them using satellite tracking to see how far they travel and, in a world first, taking DNA samples to see just how old they are. Here they are on Ningaloo reef.

Ningaloo Reef’s race for its place in the sun faces uphill battle

Here's one aspect of rising sea levels to think about - the loss in light reflected through ocean waters. Marine ecologists are asking, what are the limits, and threats, to coral skyscrapers? Because coral reefs don't just spread out - they also spread up.

Battle against white spot disease in Australian prawns

CSIRO’s efforts to help the Australian farmed prawn industry recover from this devastating outbreak also required a rapid response to protect a vital research facility that is assisting the industry pick itself back up.

Think local on Southern Ocean’s global impact

The Southern Ocean has an enormously influential role on the Earth's climate, it reaches from the Antarctic into all the world's oceans. What research now shows is local ocean processes have global impacts.