Fish

A study by the University of Maryland indicates that new offshore wind farms being constructed on the Delaware-Maryland-Virginia coastal shelf could become a stopover spot for migrating Atlantic salmon and striped bass.

Measuring more than 5 m (16 ft) long, Titanichthys was a giant armored fish that swam the oceans 380 million years ago. It may sound intimidating, but new research suggests that it fed in a manner much like that of today's harmless basking shark.

Although they don't have eyelids that they can close, fish do indeed sleep – and as is the case with humans, sleeping is crucial to their health. According to a recent study, though, city lights may be keeping them awake at night.

A new study has demonstrated how the atomic bomb tests from the Cold War era could help fill in some of the blanks for marine biologists, with scientists using nuclear isotopes to measure the age of the whale shark for the first time.

Marine aquaculture pens have to be regularly checked for holes, plus the fish need to be inspected for parasites. And although the job is typically performed by human divers, it turns out that a robotic sea turtle may be a better choice for the task.

If you've ever thought that you got food poisoning from eating sushi, you might have actually gotten worms from the stuff. A new study indicates that such fish worms are now more common than ever – although chefs usually pick them out.

Hands were one of the key things fish needed to evolve before moving out of the water and becoming tetrapods like us, and a new fossil study pinpoints a "missing link" in the evolutionary tree. Meet Elpistostege, from nearly 400 million years ago.

Skin-worn flexible electronics show great promise, in applications ranging from health monitoring to gesture control. The devices could soon also be more eco-friendly, as scientists have recently developed a method of making them from fish scales.

Two new systematic reviews have concluded omega-3 supplements confer little protective benefit against either cardiovascular disease or cancer. The research builds on prior study suggesting fish oil is mostly useless if taken by healthy individuals.

An observational study has linked fish oil supplements with improved semen quality and testicular function in healthy men. The research can't prove causation, however, it does echo research reaching similar conclusions in men with fertility issues.

The annual Ocean Art Underwater Photo competition, now in its eighth year, is a chance to get up close and personal with our marine cousins so many times removed. Here are all this year's winners and runners up in a spectacular photo gallery.

A Phase 3 clinical trial into the efficacy of a fish-oil-derived drug called Epanova has been discontinued. The trial was designed to establish the use of the drug, a formulation of two omega-3 fatty acids, as an adjunct to statins for heart disease.