Fish

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This 119 million year old fish, Rhacolepis, is the first fossil to show a 3D preserved heart which gives us a rare window into the early evolution of one of our body’s most important organs. Dr John Maisey, American Museum of Natural History in New York

The first fossilised heart ever found in a prehistoric animal

For centuries, the fossil remains of back-boned animals were studied primarily from their hardened bones. Now palaeontologists can study the softer side of these ancient creatures.
Bleached coral can take on luminously beautiful pink and purple hues - but don’t be deceived, these corals are under stress. Justin Marshall/coralwatch.org

In pictures: a close-up look at the Great Barrier Reef’s bleaching

The bleaching hitting the Great Barrier Reef not only harms corals. As these close-up photos show, it also deprives many other species of a home and livelihood.
The remote rivers of northern Australia could be home to untold numbers of new and threatened fish. Matthew Le Feuvre

We discovered 20 new fish in northern Australia – now we need to protect them

A score of new fish species discovered recently in northern Australia remind us how little we know about our country.
Fishermen rescued from a boat on which they were trafficked to work. Pring Samrang/Reuters

Why it’s so hard to fight fisheries crime

There are no proper laws to combat fisheries crime. As a result, a number of organisations need to join forces to stop the problem.
This common lionfish (Pterois volitans) was sighted more than 200km further south than expected down the NSW coast by 14-year-old scuba diver Georgia Poyner. It’s one of almost 40 verified observations she has submitted to Redmap. Redmap/Georgia Poyner

How you can help scientists track how marine life reacts to climate change

We know the warming seas are forcing some marine life to new waters, but we don't know much about how fast and how far they are moving. But now you can help scientists find the answers with Redmap.
The Great Southern Reef is unique, beautiful and contributes significantly to Australia’s culture and economy. However, few of us realise the magnitude and value of this gem right at our doorstep. T. Wernberg 2002

Australia’s ‘other’ reef is worth more than $10 billion a year - but have you heard of it?

The Great Southern Reef covers 71,000 square km and contributes more than A$10 billion to Australia's economy each year.
The tropical orange blotch surgeon fish has been moving south into New South Wales. Graham Edgar / Reef Life Survey

Following Nemo: marine life is heading south

As warmer seas move further south, tropical wildlife is going with them, giving us a dramatic insight into how global warming is changing our oceans.

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