Phytoplankton, tiny plant-like organisms in the ocean, are incredibly important for life on Earth. They're a major food source for many sea creatures and produce almost half the oxygen we breathe.

Scientists created a tool to study individual phytoplankton, helping predict climate effects and ocean health changes.

Among the myriad creatures that populate our ocean, some stand out as having an outsized impact on the marine environment—shaping and maintaining habitats that themselves sustain countless other forms ...

Projections of our future under climate change paint a picture of extreme weather and acidified oceans, a world many of today ...

Researchers are questioning what the most intelligent fish in the sea may be, after some fish have managed to pass the ...

There are mainly two families of whales: baleen whales and toothed whales. There are 14 species of baleen whales including ...

While paddling in what appeared to be an inflatable kayak, Simancas was suddenly engulfed by a humpback whale as it surfaced ...

Sam Wells believes we may have been too quick to jump to conclusions about the proliferation of jellyfish blooms ...

Human-made structures act as artificial reefs, luring plankton and, in turn, Earth’s largest fish. That could put whale sharks at risk of ship strikes.