I was looking at the seafloor, focused on identifying fish species as I normally did when diving off of the California coast, when suddenly I felt something large above me. When I turned my head I saw a giant fish – more than 6 feet (2 meters) long – calmly […]

Hundreds of temperate lakes around the world are showing trends toward anoxia, becoming warmer, murkier, and less hospitable to cold-water species. PHOTOGRAPH: ARTUR WIDAK/GETTY IMAGES KEVIN ROSE AND his team loaded their sensors into a boat and began rowing. It was late summer at Lake Giles, a small glacial lake in […]

Oxygen levels in the world’s temperate freshwater lakes are declining rapidly — faster than in the oceans — a trend driven largely by climate change that threatens freshwater biodiversity and drinking water quality. Research published on June 2, 2021, in Nature found that oxygen levels in surveyed lakes across the temperate zone […]

Atlantic cod was once one of the most important fish species in the world. The big, long-lived predator helped feed Europe and North America for centuries. But decades of overfishing in the mid–20th century caused populations to crash, wiping out 30,000 jobs in Canada alone and financially devastating many coastal […]

Floating solar farms could help to protect lakes and reservoirs from some of the harms of climate change, a new study suggests. However, given the complex nature of water bodies and differing designs of solar technologies, there could also be detrimental ecosystem impacts of deploying floating solar arrays. Credit: Giles […]

An example of what a complete fish fossil coelacanth looks like. This one is from the Jurassic of German. Credit: Professor David Martill, University of Portsmouth A serendipitous discovery of a fossilized bony lung reveals a massive ancient fish. Fossilized remains of a fish that grew as big as a […]

Plankton-feeding fishes often dominate the fish assemblage on oceanic coral reefs. Credit: Dr. Christina Skinner Study reveals open ocean waters once assumed to be unproductive are in fact teeming with an abundance of life on coral reefs. Since Charles Darwin’s day, the abundance of life on coral reefs has been […]

In warming waters, the demand for oxygen of many fish species will increase, progressively approaching the maximum oxygen supply capacity of their respiratory organs. New tool gauges impacts of warming waters on over 200 fish species. Warming ocean waters could reduce the ability of fish, especially large ones, to extract […]

Composite image showing just a small portion of the remarkable diversity of larval and juvenile fishes and invertebrates found living in surface slick nurseries along West Hawaii Island. Credit: Larval photos: Jonathan Whitney (NOAA Fisheries), Slick photo: Joey Lecky (NOAA Fisheries) The open ocean is a harsh place for newborn […]