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With many continental fish stocks in steep decline, some fleets have adopted bottom trawling as a way to keep supplies flowing; even so, it accounts for less than 1% of the total global fish catch.
If they destroy natural resources, they will build their own tomb
RĂ©mi Parmentier, Deep Sea Conservation Coalition
Powerful boats tow nets which extend to the sea floor; on the end of the net is a heavy roller or plough which keeps the net in contact with the bottom.
This ensures that any fish in the vicinity are caught, but so is everything else.
A report compiled last year for IUCN, the World Conservation Union, and other environmental groups concluded that bottom trawling is "...highly destructive to the biodiversity associated with seamounts and deep-sea coral ecosystems and... likely to pose significant risks to this biodiversity, including the risk of species extinction."