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Treated sewage released into rivers may hamper eel migrations

18 July 2023

European eels avoid swimming through plumes of effluent from sewage treatment plants, which could delay their journeys and use up precious energy reserves

Mass fish deaths will occur more often in rivers as UK gets hotter

14 July 2023

Large numbers of dead fish have been seen in many UK rivers in recent weeks, and researchers warn that climate change will lead to more such events

Freshwater fish can recover from mercury pollution in just a few years

15 December 2021

Mercury pollution is a major global environmental problem, with small-scale gold mining and coal burning the two biggest sources, but fish can recover quickly when the pollution stops

A lack of fish faeces is changing the flow of carbon in the ocean

11 October 2021

Fish faeces plays an important role in the carbon cycle of the ocean, but industrial fishing has lead to a lack of defecation

Global demand for fish expected to almost double by 2050

15 September 2021

Brazil, Ghana, India and Nigeria are all predicted to more than double the weight of fish they consume by 2050, with aquaculture feeding demand

Adult fish sizes have shrunk over 50 years of sea temperature rises

31 December 2020

Fish in the North Sea are growing faster as juveniles but ending up smaller as adults. The pattern seems to be linked to rising sea temperatures

Some fish fins are as sensitive to touch as human fingertips

3 November 2020

The round goby fish, which lives on the bottom of lakes and seas, has fins that are as sensitive to tactile information as the fingertips of humans and other primates

Deep-sea anglerfish fuse bodies to mate thanks to an odd immune system

30 July 2020

Some male anglerfish fuse to the much larger females to mate – they can do so because they don’t recognise their partner’s tissue as foreign material that should be attacked

Climate change will make world too hot for 60 per cent of fish species

2 July 2020

Fish are at a far greater risk from climate change than previously thought, after researchers showed embryos and spawning adults are more susceptible to warming oceans

Fish used for sushi now carry 283 times more parasites than in 1980s

19 March 2020

Between 1978 and 2015, the number of parasitic Anisakis worms found in fish increased 283 times – which means sushi could be more likely to be infected, as are marine mammals such as dolphins and whales