People eat a lot of fish. Different sex-changing fish can follow several signals that prompt them to change sex. Some change from female to male at a fixed size or age. Often, fisheries will only harvest fish over a certain size. This means catching more males because they are usually bigger, which then skews the population towards female. Not enough males are then available to fertilise all the eggs produced by the females.
Scientists urge divers to remove lionfish whent they see them in the Mediterranean as they are a huge threat to native species
Good news for Indonesia's shark sanctuary: sharks and other fish are more abundant within zones with fishing restrictions according to a new study. Bad news for the people who fish for a living - they sometimes turned to crime...
Lionfish, genus Pterois, is very popular amongst those with aquariums, and this trade may have led to them being described as amongst some of the most aggressively invasive species on the planet. Lionfish are native to the...