To fish the oceans sustainably, nations must reduce bycatch, or accidental catches. But fishermen often resist changing gear or techniques that kill nontargeted species.

Rats are disrupting the flow of nutrients towards the sea on many tropical islands – this has consequences for fish behaviour and the wider ecosystem.

Coral bleaching can make it harder for fish to recognize their competitors and avoid fights. That can use up a lot of precious energy.

Understanding when, where and why fishing vessels sometimes turn off their transponders is a key step toward curbing illegal fishing and other crimes on the high seas.

A new study shows that a time stamp can be put on mercury that accumulates in fish eyes, offering a window into their lifetime exposure.

A new method tracks and measures how fish make their way from the water to the plate within Malawi.