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The size of fish in the is shrinking. A new report from the University of British Columbia in Canada fish may shrink by as much as a quarter in the decades because of global warming. The research team conducted extensive on the effect of rising ocean temperatures on the size and number of over 600 of fish around the world. They concluded that most fish are to shrink in size by 14-24 per cent the year 2050. The biggest changes will be in tropical regions. The scientists said there is less oxygen in warmer water so fish cannot grow at the they should. They added that many fish will migrate to cooler waters outside the .

Lead researcher Professor William Cheung said: "We were surprised to see such a decrease in fish size. Marine fish are generally to respond to climate change through changing and seasonality. But the unexpectedly big that climate change could have on body size that we may be missing a big piece of the of understanding climate change effects in the ocean." He that human activities such as overfishing and pollution will the problem: “Our work shows a very concerning for the oceans and so it is very important to reduce greenhouse gas emissions and develop better fish management policies to to these changes,” he said.