Strangely enough, you use the lobster as "pliers" to turn the lighthouse light and scare away the seagull from the school bell tower. (So you can fix the school bell.)
(see related question)
You have to recover the lobster trap for Cap'n Salty, by the lighthouse and the jet ski. Catch an old photograph that is blowing in the wind near the lighthouse and swap it for Scuba gear at the "Say Cheese" photo shop. Then use the "dive" to get Cap'n Salty's lost lobster trap. You have to go all the way to the bottom right. Return it to Cap'n Salty. 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.
the tool is the lobster
You fetch the lobster trap.
You get the keys from the lobster guy. Then you ride. Jump when necessary to reach the island. Be faster than Nate!!
The crustacean in the lobster trap is a lobster. (see the related questions)
On Big Nate Island, you use a lobster (no kidding) to turn the lighthouse crank. (see the related question below)
Once. But you have to be at the lighthouse crank. Use the lobster and it will automatically complete the process.
you already get them when you get the lobster from the fisher man who needed the crab cage.
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
use the lobster that you can get after completing cap'n salty's quest
You get "pliers" on Big Nate Island* by using the lobster. To get the lobster, catch the photo flying around to the left of the lighthouse. Swap it for scuba gear at the photo shop, and dive to recover Cap'n Salty's lost lobster trap. *Pliers on 24 carrot island are "wire cutters". (See related question)
Use the lobster to crank the lighthouse light. Turning it left will scare the seagull from the school's bell tower.
Once you have the lobster, climb the lighthouse and use it to turn the light to the left, scaring away the bird.