What is it called?

A guy walks into a chinesse restaurant with his wife. The waiter approaches, the guy asks for “a table for two”. As they are waiting for a table to be prepared, his wife cant help to notice a fish tank full of beutiful tropical fish.

The wife turns to her husband and demands that she wants the same fish brought for her at home. The husband agrees and asks the waiter what the fish are called.

The waiter replies “sushi”.