There was an aquarium called "Atlantis Marine World" near where my brothers and I grew up. This was the first place my brother heard the word "marine", so he thought "Marines" were people who worked at aquariums.
Ironically, he is now going to a military academy (to be in the Army, not the Marines.)
A childhood belief about names

others believed things like this
- I heard the song about Heaven being a place where nothing ever happened and thought, "What a boring place."Anon
- In first grade, I thought that if I've never heard of a word before, then it wasn't a word.— Destiny
- I used to believe that the salvation army was an actual army.Anon
- a friend of my little sister's had 4 older brothers, so she thought that when you got older you grew a penis!Anon
- I used to beleive in stores that were open 24/7 , that the people that worked there worked 24/7 nonstop.Anon
- I thought there was no midnight in military time; instead, it’d be 24:00.— Enrico