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

Adaptations of the teeth and jaws that allow the fish to adapt to a wide range of food sources and habitats are thought to be a factor in their success. Fish, including cichlids, have either ...

One finding of this study challenged the traditional trimethylamine N-oxide (TMAO) hypothesis of deep-sea adaptation. While TMAO levels increase with depth in fish living between 0 and 6,000 ...

Fish at the other end of Earth ... In each case, evolutionary adaptations allow them to exploit a food niche of ants and termites, but the developments occurred independently.