Blue sharks don't dive as deeply in low-oxygen waters—which become more prevalent as oceans warm—effectively pushing them into areas of high fishing pressure.

The decades-old signature of nuclear testing can reveal the ages of organisms, or even individual cells.

A newfound family of metabolites emits green light in response to the blue light of the deep ocean, causing certain sharks to glow.

Sharks and rays can get entangled in abandoned fishing gear, leading to injuries or death.

A newly developed underwater ultrasound reveals a fetal shark swimming between the two uteri of its mother.

In addition to detecting unseen organisms in the ocean, studies of environmental DNA can shed light on the genetic structure of marine populations.

Watch scenes from research at the University of South Florida's Mote Marine Laboratory, where scientists saw what happened when they knocked out sharks' electroreception.