I'm quite happy to net a fish and then let it go.

我特别喜欢捞到一条鱼后再把它放了。

《柯林斯英汉双解大词典》

After a while, Zhuang Zi said, "Look at the fish! How happy they are!"

过了一会儿，庄子说：“看这些鱼！它们多快乐啊！”

youdao

His friend asked him, "You are not a fish. How do you know they are happy?"

他的朋友问他：“你不是鱼。怎么知道鱼的快乐？”

youdao

Eighth seed Fish was less happy to play in the scorching afternoon heat, complaining about the timeouts that Colombian opponent Alejandro Falla took for treating cramps before sealing a 7-6 (7-4) 6-3 7-6 (8-6) victory.

CNN: Nadal into third round as Federer walks it

The ice was so thick and clean and glimmery that the fish and errant golf balls were happy to be frozen in it.

NPR: Chapter 1

Although sceptical at first, fish buyers along the Foyle are now happy with the scheme.

BBC: Salmon tagging scheme criticised