howmany后面应该加fish还是bird

后面加fish，例如：

1、How many fish did you catch?你捕到几条鱼

2、How many fish did you catch today?你今天钓了几条

3、How many fish do you think there were in that school?你想在那个鱼群里有多少鱼

4、How many fish were there in that school?那群里有多少条鱼