Deep-sea fish thrive in extreme pressure, darkness, and pollution, revealing new survival mechanisms and threats.

The deep sea, covering approximately 65% of Earth's surface, has long been considered a biological desert. In this extreme ...

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That beast—which he also called “the bane of my existence, the nemesis of my golden years, the bold perverter of the Endangered Species Act”—was none other than the snail darter, a fish no ...

A tiny fish that averages only 2.5 inches in length derailed political careers, delayed construction of a massive dam and reservoir, caused a U.S. Supreme Court landmark case and prompted ...