When you say that phrase, you are saying that you found a fact from a reliable source, such as a website, dictionary, encyclopedia, etc.
If I threw myself a surprise party it would be held at a planetarium and I would invite Brian May (guitarist for the band Queen, and astrophysicist) so I could ask him about his life and tell him how much I love his work in all forms (music and science).
Answer:
The answer is somewhere the fish would live.
I believe the answer to this question would be either a metaphor, idiom, or alliteration. But this would most likely be idiom because people can interpret different meanings of this phrase negative or positive and can take it personally or extensively.
The answer is 3, using words in a certain way to persuade the reader.