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Fish such as cod, flounder, and haddock are caught in this way.

鳕、比目鱼、黑线鳕等都是用这种方法捕捞的。

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In trawling, a fishing boat drags a bag-shaped net along the sea bottom. Fish such as cod, flounder, and haddock are caught in this way.

用拖网捕鱼时，渔船拖着一个袋状的网，从海底兜网鱼类。鳕、比目鱼、黑线鳕等都是用这种方法捕捞的。

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In general, white-fleshed fish, such as cod, tilapia, or flounder, are low in all types of fat, including omega-3s.

CNN: How to buy the best fish

But fishing is an expensive proposition when going after overfished varieties such as cod, so prized in the established markets.

FORBES: Blue Waters Gray Areas

Quotas limit the amount of wet fish - such as cod, bass and ray - boats can catch to protect fish stocks.

BBC: Jersey States discussing local fish quotas