Ocean heat waves often lurk out of sight
Warmer-than-usual waters can harm ecosystems and are often undetectable at the ocean’s surface
![A large school of small fish swim in the ocean, taken from the vantage point of the school swimming right past the viewer.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2023/12/121323_kk_marine_heat_waves_feat.jpg?fit=1030%2C580&ssl=1)
Ocean heat waves, which can be detrimental to marine ecosystems, often remain hidden from view.
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