The trap is at the bottom right. The easiest way to get it is to go right first, then down. You do not need oxygen to get back up.
To grip the light, you use a lobster. To get the lobster, you need to go underwater and get the lost cage for Cap'n Salty. (see the related question)
You find the lobster trap and give it to Cap'n Salty. He will give you a lobster and the keys to his jet ski. Climb to the top of the lighthouse and use the lobster as a wrench to turn the light and scare the seagull from the school. While there, look through the telescope to see your next destination, which is Seal Island. Race Nate to get the map from the rock.
the tool is the lobster
You get the keys from the lobster guy. Then you ride. Jump when necessary to reach the island. Be faster than Nate!!
dive underwater find the lobster give it to the old man he says you can keep it go up the lighthouse find the light pinch the lobster with and see what's next
You fetch the lobster trap.
The crustacean in the lobster trap is a lobster. (see the related questions)
You need to get the diving gear to do this
On Big Nate Island, you use a lobster (no kidding) to turn the lighthouse crank. (see the related question below)
you never give the lobster to the seagul you shine the light houses light to the seagull and the lobster you give to the man
Once. But you have to be at the lighthouse crank. Use the lobster and it will automatically complete the process.
Captain salty's trap in underwater. To go underwater you will need to give the old photograph to the guy who is in the photo studio,he will give you the swimsuit.Put it on and dive underneath the water to get the trap.