For a small fish only found in the San Francisco Estuary, the delta smelt has caused a lot of controversy over the years.

Deep below the surface of a river in northern Brazil, a “shy” creature tucked its “armored” body into a rocky crevice. Divers ...

The SMASH acronym represents three key fish species—sardines, mackerel, and anchovies—that are central to the study’s findings. Anchovies are another nutrient-dense small fish, known for ...