Regarding the use of が instead of は in 「いけのなかにさかな｛が・は｝たくさんいますか。」


> いけのなかにさかな＿たくさんいますか。

So my question is, would the particle affect the emphasis we want to put on
either asking if there ARE Fish inside the pond, or if we are asking how MANY
Fish there are in the pond? Or is there no clear answer?




Go with が. That's what you usually use with いる or ある, because it's a
statement, a description ("there is something").

Using は here would be possible in a context where, for instance, you'd want to
insist on the fact that it's fish and not something else ("I'm asking if there
are fishes in the pond, not birds!")

