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Researchers used to need to scuba dive to find out which fish live in any given area of the ocean.

Three University of Guam professors and the lead of a community conservation group were awarded research grants to analyze coral reef conditions and marine life on Guam...The projects must focus on healthy coastal ecosystems, environmental literacy or workforce development in Guam, the

Great Barrier Reef Foundation Chief Scientist Professor Ove Hoegh-Guldberg shone a spotlight on the threats facing coral reefs and the Foundation’s innovative work to protect them at the global launch of the United Nations’ campaign to protect our oceans.

About four years ago, Colin Simpfendorfer was diving on reefs in Indonesia’s picture-perfect Raja Ampat region when he noticed the distinct absence of something. “It’s a beautiful place to dive. We would have expected to see grey reef sharks and white tips,” says the veteran scientist.

There may be plenty of fish in the sea, but how many did there used to be? The answer to that question is lurking in DNA hidden at the bottom of the ocean.

The number of sharks and rays worldwide has fallen by 71 per cent in the last 50 years and according to Australian and international research more than three-quarters of species are now threatened with extinction.

Estimating the number of fish in the sea is a wet, cold, and inexact business. To gauge how populations are faring—a critical part of managing fisheries—researchers typically drag a large net behind a ship, counting and measuring what they catch.

A new study shows the coastal protection coral reefs currently provide will start eroding by the end of the century, as the world continues to warm and the oceans acidify.

Humans are often implicated in orca deaths. Now a team that looked at how orcas in the Pacific Ocean died has linked some deaths with human activity. Despite commonly being called killer whales, orcas are actually dolphins.

When it was born, the second world war was several years away, none of the Beatles were alive and there were about five billion fewer people above the waves than today.