I have an almost encyclopedic knowledge of fish from the atlantic basin, specifically in and around the south east US and Carribean.
It freaks people out sometimes when I just start reciting fish facts whenever the rare occasion this comes up.
It's from me living partially on a boat as a child and tearing through books about fish while dreaming of being a marine biologist until the cold hard reality of for-profit education hit me in my early adulthood.
What are your weird topics and skills?
My SO was on a rival trivia team at our regular bar and we ended up bonding on those nights originally.