How can you tell what sex a fish is?

你怎样辨别一条鱼的雌雄？

《牛津词典》

A fish is not a bird, how will it understand bird's happiness.

鱼不是鸟，怎会了解鸟的快乐。

youdao

The answer is yes, but how fish drink water depends on where they live.

答案是肯定的，但是鱼儿怎么喝水取决于它们生活在哪。

youdao

Also, not to be impolite or anything, but how expressive is a fish, until it hits a grill?

NEWYORKER: Finding Nemo

And that, it seems, is how bony fish came to dominate the oceans.

ECONOMIST: Fish genetics

The habitat impact of catching monkfish is "acceptable, " says Laurel Bryant, director of external affairs at National Oceanic and Atmospheric Administration's Fisheries Service, which counts and regulates how much fish is caught in the U.S. and maintains its own extensive seafood-buying guide called FishWatch.

WSJ: Guidelines for Eating Sustainable Seafood