It is a fish.

这是一条小鱼。

youdao

Oh, there is another strange sea life, you know, the sea horse. It is a fish, but it does not look like a fish.

噢，还有一种怪异的海洋生物，那就是海马。海马是鱼，但是它长得又不像鱼。

youdao

The sea horse is a small fish. It likes living in warm water. A sea horse always stands up in the water when it swims.

海马是一种很小的鱼类，它喜欢生活在温暖的水域，当它在水里游的时候它总是站立的姿势。

youdao

It is so crowded that we are packed like sardines - just like small fish in a can.

VOA: special.2011.02.27

It is hard to imagine why anyone would want to shoot fish in a barrel.

VOA: special.2009.06.07

At this point, it is a period of rains and people are able to fish."

VOA: standard.2009.08.08

"It is a fish with a lot of character, " Mr. Ripert said.

WSJ: Eric Ripert's Saut��ed Cod With Mustard Greens | Slow Food Fast

"It could produce as much as it needs but instead it is a net importer of fish, " he said.

BBC: Cod and haddock demand 'exceeds UK sea supply'

"It is sort of like breaking a fish oil capsule over a hot fudge sundae and expecting the effect of the calories and saturated fat to go away, " she said.

NPR: Study: Fish Oil Doesn't Help Prevent Heart Attacks