When the sea level rises to its highest point, we call that high tide. When it falls to its lowest point, that’s called low tide.
The Moon has gravity of its own, which pulls the oceans (and us) towards it.
Deep sea corals off Florida.
A massive new discovery this summer of miles of corals in deep waters off South Carolina shows how much we have yet to learn about life on the ocean floor.
The Giant Sea Bass at the California Academy of Sciences. Fishes'sense of smell is highly affected by high level of carbon dioxide in the ocean.
Increase of carbon dioxide in the ocean affects the way fish detect predators, mates or food and could threaten not only individual fish but entire populations.
The Antarctic Circumpolar Current keeps Antarctica cold.
The Antarctic Circumpolar Current provides a barrier to heat that keeps warm subtropical waters away from Antarctica. Yet, there are a few places where the heat gets through.
Surgeonfish on a reef in the Maldives.
Drastic oxygen losses in the world's oceans millions of years ago coincided with mass extinctions. Scientists see this as a warning about how climate change could affect oceans today.
Globalised fishing can leave workers vulnerable to exploitation.
A lack of sustainability, profitability and transparency in the global fishing industry is exacerbating the problem of slave-like working conditions for crew. Here are the warning signs to look out for.
The ocean absorbs about 90 percent of the excess heat produced as climate change warms the earth.
According to a new study, the oceans have absorbed more heat from climate change than previously thought. This could mean the Earth will warm even faster in the future than scientists have predicted.
A member of a rare group of 410-million-year-old jawless fishes from Australia meets a mate.
along the shoreline (artist’s impression).
New research shows shallow, near-land seas similar to Bass Strait were critical in the early days of fish evolution. These are the waters we need to protect now to ensure ongoing biodiversity.
An effort to increase such areas can pose a particular threat to island overseas territories.
Building an artificial reef.
Coral reefs are in crisis around the world, and may disappear entirely. 3D printing is a new idea to help them – but it won't be a cure all.
A three-banded clownfish (
Amphiprion ocellaris) navigates the anemones of the Andaman Coral Reef, India.
Our children all know the little clownfish Nemo, star of the Pixar film. But why does he have three stripes, rather than one or two? Developmental and evolutionary biology are revealing the answer.
Swordfish only – no bycatch, please.
Joe Fish Flynn/shutterstock
A new tool called EcoCast helps fishermen in the West Coast figure out where it's best to fish that day.
The scientific drilling ship JOIDES Resolution arrives in Honolulu after successful sea trials and testing of scientific and drilling equipment.
The ocean floor holds unique information about Earth's history. Scientific ocean drilling, which started 50 years ago, has yielded insights into climate change, geohazards and the key conditions for life.
The warming of the oceans means that the plants and organisms used as warning systems for pollution are being rendered ineffective.
Some sea creatures are displaced by the desalination plant, but others actually grow.
Pumping very salty water into the ocean has surprisingly little impact on marine life.
The Derwent River Sea Star was only documented for 25 years before its extinction.
Blair Patulo, Museums Victoria
It's quite hard to tell when a sea creature is extinct – there's always hope it will turn up somewhere.
Salt water is fun to swim in – but it also carries the electrical signals vital for life.
We take salt water for granted, and often overlook how important it is for our own lives and in sustaining a healthy planet.
The myth of the empty sea is largely the product of European imperialisms and their map-making.
A new project takes a different look at the role of oceans.
UK bound? The oceanic whitetip.
Forget the scare stories, sharks are good for our oceans.
Waves lap against the shore on the south coast of England and the North coast of France – but the answer to this puzzle is in the wind and the land, not the waves themselves.