I love to eat sushi but I don't actually know much about it
its a type of rice which can be prepared with either brown or white rice.
Does it typically have fish in it?
can be prepared with either brown or white rice.though some are vegetarian
ah, that's cool.  Where did sushi originate?
 sushi began with paddy fields in Southeast Asia, where fish was fermented with salt and rice, after which the rice was discarded.
Oh wow, do you know when it began?
 history of sushi began with paddy fields in Southeast Asia,
Okay.  I've probably had an Americanized version of sushi, not very authentic, since I'm from the US.
interetingly,there is sustainable,which  sushi is sushi made from fished or farmed sources that can be maintained or whose future production does not significantly jeopardize the ecosystems from which it is acquired