Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many different people directed the episode titled "Fail Fish"?

### Inputs:
table_name: table, columns: ['No. in series', 'Title', 'Directed by', 'Story & Storyboards by', 'Original air date', 'U.S. viewers (millions)']

### Response:
SELECT COUNT Directed by FROM table WHERE Title = "Fail Fish"