RE: How much is the fish?
The phrase "How much is the fish?" appears to be a reference to a value or price. If you're referring to a variable denoted as 'fish', it would be set as follows in different languages:
In Python:
```
fish = 15
```
In JavaScript:
```
var fish = 15;
```
In Java:
```
int fish = 15;
```
Keep in mind that the value of 'fish' can change throughout your program, and it's best practice to use clear and concise variable names to prevent confusion.