The Octonauts and the Damselfish in Distress

The Octonauts and the Damselfish in Distress is the 34th episode of Season 4.

Summary
Captain Hook thinks that the damselfish are looking for gold under their patches of algae and wants to find some. But he gets the damselfish really stressed out and they asked the Octonauts the help them kick Hook out of their algae farm.