I WONDER - Why Does An Octopus Have Ink?

Octopi use ink to hide from enemies, but the ink also serves to harm them by irritating their senses. The chemical in the ink can confuse the enemy's sense of smell and taste. However, the ink is so potent that it can also pose a danger to the octopus if it doesn't escape quickly.

What is one way octopi use ink to protect themselves?

What additional purpose does octopus ink serve besides hiding?

How does the chemical in octopus ink affect its enemies?

What senses of the enemy can be confused by octopus ink?

What could happen to an octopus if it doesn't escape quickly after using ink?