The Food and Agriculture Organisation has issued a caution on the repercussions of climate change on fisheries and aquaculture. It is that the changes seen in the seas and oceans will have direct implications for food security. This is particularly relevant to developing countries where about 42 million people work directly in the sector and 2.8 billion depend on fish products for 20 per cent of animal protein. Although the impact of higher temperatures is more pronounced in certain geographical locations and more intense in surface waters, studies have confirmed that warming of the oceans can go deeper than 700 metres. This is ominous. Any further heating of the ocean water, which acts as a sink by storing more than 90 per cent of the earth's heat, can result in some tipping points being crossed, which means the environment can be affected in some major ways. The warming of surface water has already led to changes in species composition in the northern hemisphere