Many fish farms create pollution, too.

很多养鱼场也在制造污染。

youdao

The conditions on the fish farms are surprisingly clean.

这里鱼类养殖场的条件出乎意料地干净。

youdao

It slips into fish farms and quietly works through the stock.

它溜进鱼场，静悄悄地闯过水中的树枝。

youdao

They were put to work as cleaners at fish farms along the Mississippi River and in wastewater treatment systems.

VOA: special.2009.12.15

But Arctic air has damaged some Florida oranges and strawberries in recent days, and killed fish at tropical fish farms.

VOA: special.2010.01.12

Suchart Ingthamjitr, a program officer at the MRC's fishery program, says fish farms help meet demand.

VOA: standard.2010.01.11

Tze, 34, is the managing director of Aquacopia, an investment firm providing venture capital to fish farms.

FORBES: Magazine Article

It says the only way to do this is through controlled fish farms.

CNN: All about: Global fishing

But the practice is common in many parts of the world and there is a similar issue with fish farms.

BBC: Analysis: Antibiotic apocalypse