Lobster

Use the Lobster to act as a wrench and turn the light to face the school. This will scare the seagull who is there away.

How to get the Lobster

Once you get the Lobster trap, you’ll re-appear at the start and then you just need to swim back up to the dock. When you’re there, give the trap to the sailor at the dock. He’ll give you the lobster that was inside and the keys to his jet ski.