Vanishing species : trawlers at anchor in hong kong .
消失的行当：香港抛锚的拖网渔船。
The trawlers were seized friday off ishikawa prefecture within japan 's exclusive economic zone , kyodo quoted the coast guard as saying .
共同社援引海上保安的话说，渔船星期五在石川县附近日本专属经济区里被扣留。
Bottom trawlers are banned from fishing within the 12-mile limit , and inspectors can instantly close any area for a fortnight or more if they think it is being overfished .
