He may be an old fish and may know some way of escape.

他会不会是条老鱼，也许他知道怎么逃跑。

youdao

The old man's a real cold fish. I've never seen him laugh.

这老头真是个冷冰冰的人，我从来没见他笑过。

《新英汉大辞典》

How many did you ever kill, old fish?

你杀死过多少啊，好鱼？

youdao

It's four o'clock in the morning and the 68-year-old fisherman is dragging a plastic trunk of fish carcasses across the dock toward his boat.

VOA: standard.2010.07.20

You could see from the fishermen's catches that their fish were really small, not like in the old days, not like even 20 years ago.

VOA: standard.2010.08.04

Nicholas Tyers, a 43 year old fish and chip shop owner in Bridlington.

BBC: NEWS | UK | UK Politics | David Davis speech in full

Yet this idea, from Ronald Stamp, a 46-year-old former fish wholesaler, has a certain oddball allure.

FORBES: It's The Tap Of The Iceberg

Yet readers of a popular Australian men's magazine voted the 44-year old ex-fish and chip vendor one of the world's sexiest women.

CNN: PEOPLE