Dream: the radioactive barramundi

In this dream I'm just about to embark on a long road trip with my dad, I think we were planning to drive from Darwin to Sydney but I can't remember the route we were going to take. I look out the window and our Honda is parked just outside, but it looks like the alleyway outside our house in Shanghai. I wonder how it's possible that our car seems to have made its way to Shanghai for a roadtrip starting in Darwin. Looking around, I seem to be sitting in my living room in Shanghai too.

I tell my dad that we are already running late, so we need to look at the map and check how far we can get that day. He tells me not to worry, then there is a knock at the door.

When I open the door a man comes in pushing in a catering-style trolley, covered in a cloth. This is the type of trolley that's used to serve food at meetings etc, with enough space for big platters to be stored on several tiers. He says he has a present for us and without delay starts telling us about how he caught a giant barramundi and wants to give it to us to take on the road trip.

Just as I'm wondering why there are giant barramundi in Shanghai, he lifts the cloth from the trolley and I see a whole row of giant jars like the ones used to preserve rice wine. He starts taking the jars down and naming the fillets "this one came from the front of the left side of the barra... this one's from near the tail" - fillets of barramundi seem to be swimming in some amber-coloured unidentified liquid inside the jars.

He finishes unloading the jars, probably about 20 of them in total. There are 3 jars left on the trolley and I ask the man "what's in those?" He picks up one and shows it to me, and it is the most hideous fish head I have ever seen.

"Hold on, you can keep those. I don't like fish heads." I say to the man.
He looks disappointed and points to the other two jars, "What will I do with these then?" he asks.
I look at the other two jars and each seems to contain a giant hideous fish head.
"Wait, if you only caught one barramundi, how come you have three heads?" I ask.

He stares at me like I've just asked a crazy question and finally says "Don't you know? This fish was raised in radioactive nuclear-contaminated water in Japan, it's full of genetic mutations!"

Then I wake up.