Biologists are finding new evidence that these ocean invertebrate grazers don't just ingest whatever they catch. They can actually be picky eaters – and their choices might influence ocean food webs.
Walter Munk might be the most under-appreciated man in surfing, but he is a big deal in ocean science. If you've ever checked a surf forecast before paddling out, you have him to thank.
Pictures of ocean bays emptied of water as Hurricane Irma moved through the Caribbean and Florida show that storm surges can move away from the coast, as well as onto it.
A special combination of rain, rocks and subsea volcanoes makes the sea salty.
Humpback whales are deterred from their migration routes by the noise of air guns used to survey the ocean floor for oil and gas deposits, a new study has found.
Surveying the bottom of the ocean turns out to be far from easy. But there was something wonderful about seeing animals we have only read about in old books.
Africa's overall contribution to research might be small, but smart people are undertaking smart and important work on and about the continent.
Oceanographers say they have the "credible new information" authorities need to resume the search for the missing Malaysia Airlines flight MH370.
The search for MH370 has been officially suspended without having found the plane. Where could MH370 be? Was the search in vain?
One of the environmental legacies of the Obama administration is ocean reserves. Two ocean scientists explain why these are a critical but not sufficient piece of conservation.
In coming decades many oil and gas platforms will have to be retired. Rather than being dismantled, they could be given a new lease of life as artificial reefs, helping industry and the environment.
Australia is surrounded by ocean, so is not immune to the effects of tsunamis. But how significant is the risk?
Further analysis of the debris from missing Malaysia Airlines flight MH370 point to a possible new search area in the Indian Ocean.
Scientists are using detailed computer models of the ocean to trace debris back through the currents to the potential crash site.
Tiny animals along for the ride, called epibionts, could be used as living data-loggers. Researchers can glean info from them that could help inform turtle-friendly fisheries management decisions.
Could this new technology do for the microscopic marine world what the first telescopes did for the heavens above?
Closing the passage between the Atlantic and Pacific oceans strengthened the gulf stream and helped kick off ice ages.
Climate change isn't the only thing making sea levels higher and cyclones more intense.
Researchers have long used such techniques to learn about currents and tides.
The open oceans are the world's "wild west", falling outside any nation's jurisdiction. UN negotiations are aiming to draft new laws for the high seas.