this reminded me, when we were moving from Portugal to Belguim, DD aged 10 went to a local Scottish Primary for a few weeks, she wanted to have school dinners as she had never had them,,,,,,. Fish Fingers,,, call from school, she was being disruptive and could we attend please, she had never had Fish Fingers and was pointing out loudly and clearly in more than one language, that fish do not have fingers and where was its head and tail.
Before moving to Portugal we had lived in the NE of Scotland where we got fish from family who had trawlers, or the fishmongers.
In Portugal her dad caught fish for our restaurant or we bought it at the fish market.
The school were very agressive when we pointed out she was actually correct and fish do not have fingers, and perhaps it might be good to include an item on this in class.
It is still a standing joke in our family about DD and the Fish fingers.
She took a packed lunch for the following weeks.