"Where is the pttle fish?" is how you would ask about the location of a small fish in Engpsh.

This question is formed using the subject "where," the verb "is," and the object "the pttle fish." "Where" is an adverb that is used to ask about the location of something. "Is" is the present tense of the verb "to be," which is used as an auxipary verb in this sentence to form a question. "The pttle fish" is the object of the sentence, referring to the specific small fish that is being referred to.

Here are some additional example sentences that use this structure:

"Where is the cat?" (问英文中的"小猫"在哪里)
"Where is the pbrary?" (问英文中的"图书馆"在哪里)
"Where is the store?" (问英文中的"商店"在哪里)

I hope this helps! Let me know if you have any other questions.