there are 【a lot of】 fish in the river 对括号部分提问

there are 【a lot of】 fish in the river 对括号部分提问

How many fish are there in the river?

how much fish are there in the river?

How much fish are there in the river？
a lot of，许多，大量，对数量提问，用how many （提问可数名词）或者how much（提问不可数名词），这里鱼不可数，所以用how much