Fish

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.

The FDA has expanded its approval of a fish oil-derived drug designed to reduce risk of cardiovascular events in adults with elevated triglyceride levels. The drug was initially approved in 2012, but limited to a highly specific sub-set of patients.

An international team of researchers suggests that a wide variety of marine species could be used for monitoring the world's oceans. Using electronic tags, exploiting their natural behavior could fill gaps in our knowledge of the seas.

We recently heard how scientists from the University of Washington had developed a suction cup inspired by the clingfish. Well, researchers at UC San Diego have taken a different approach to create one of their own, and they've even used it on an underwater robot.

Scientists have developed a clingfish-inspired suction cup, that outperforms the actual fish itself.