PORTLAND, Maine — This year’s marine heat waves and spiking ocean temperatures foretell big changes in the future for some of the largest fish in the sea, such as sharks, tunas and swordfish. The ...

When you think about climate change in our oceans, you may picture coral bleaching, melting sea ice, or extreme weather events. But beneath the ocean’s surface, another quiet shift is underway.

A new study has found that oceanographic connectivity (the movement and exchange of water between different parts of the ocean) is a key influence for fish abundance across the Western Indian Ocean ...

You’re a fish in the ocean. It’s 2023 and humans have begun deploying swarms of sentinel robot fish along the reef where you live that will monitor your environment, track pollution and collect ...

This story originally appeared in Hakai and is part of the Climate Desk collaboration. The ocean has a way of upending expectations. Four-story-high rogue waves peak and collapse without warning.

As oceans warm, marine predators are increasingly forced to eat smaller prey, leaving them working harder for less energy.