The invasive blackchin tilapia has spread to 17 provinces, threatening agriculture.

The discovery of dozens of dead fish in Telford leads to oxygen being pumped into the water.

Experts say the fish were displaced from rivers and lakes after floods last year.

Work around the Tongland Dam in Galloway hopes to try to address a 90% drop in fish numbers.

Holidaymakers in Norfolk and Suffolk say the fish have caused serious pain after being stepped on.

It is believed oarfish, which live in the deep sea, often come up to shore before earthquakes.

Beachgoers are warned to take care after an increase in the number of people being stung.

As the Earth's rivers warm, salmon must either struggle to survive in a degraded habitat or move to cooler waters – but native Alaskan fishing practices are helping protect them.