See Cap'n Salty, by the lighthouse and the jet ski.
The diving mini-game is the way to get the trap. You will need an old photograph that is blowing in the wind near the lighthouse : swap it for Scuba gear at the "Say Cheese" photo shop. Then dive for Cap'n Salty's lost lobster trap. He will let you keep a lobster and give you the key to the jet ski.
Avoid the bubbles as you dive - the trap is at the bottom right. It may benefit you to swim out all the way right before going down. If you get the trap, it doesn't matter if you run out of air.
You first need to get scuba gear, which you can get from the school picture guy for an old picture floating near the lighthouse, then you can dive under the water and quickly get the trap.
You fetch the lobster trap.
The crustacean in the lobster trap is a lobster. (see the related questions)
When you dive to the bottom right at Puffin Point, just walk into the trap to pick it up.
Yes, the trap is at the bottom right. Walk into it with your character to pick it up.
you need to get a lobster by using a lobster trap.
You dive for Cap'n Salty's lobster trap. (see related question)
You don't. Give the trap to the old man (Cap'n Salty) and he will give you a lobster and the keys to his jet ski.
The wrench is the lobster that you get from Captain Salty after retrieving his lobster trap.
There is no net on Big Nate island. There is a lobster trap, and you can recover it for Cap'n Salty. Grab the photo blowing around by the lighthouse and take it to the Say Cheese photo shop. The owner will give you some scuba gear to dive for the trap.
The lighthouse light can be turned using a lobster to grip it. To get the lobster, dive for Cap'n Salty's lost lobster trap.(see related question)
The lobster can turn the crank on the light at the top of the lighthouse, scaring away the seagull from the school bell tower.
The old sailor (Cap'n Salty) will give you the keys to his jetski, and a lobster from the trap. You use the lobster as "pliers" to turn the lighthouse light and scare the seagull away from the school bell tower. You look through the lighthouse telescope and see the paper on the seal island. Race Nate on the jetski to get the paper from the island. (see related questions)