You don't. You just scare it away.
Get the photo blowing in the air by the lighthouse, and take it to the Say Cheese photo shop. The owner will give you some diving gear, and you can dive for Cap'n Salty's lost lobster trap at Puffin Point. Cap'n Salty will give you the lobster as a reward, and you can use it to grip the lighthouse light. Turning it to the left will scare the seagull from the school's bell tower.
To get the seagull away, you have to turn the lighthouse light. Use the lobster.
you dont
The bell on Big Nate Island on poptropica is located on the top school building. To reach it when you have the clapper, you need to get rid of the seagull there. (see related question)
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
There are no seagulls to ride on (as of yet) on a Poptropica island. Gulls appear on Big Nate Island, Ghost Story Island, and Wimpy Boardwalk.
get the lobster and the go to the top of the lighthouse and there is a light thing use the lobster and it would turn and chase away the seagull
The seagull has to be chased from the bell tower. (see related question)
No. Climb to the lighthouse light and use the lobster like pliers to turn the light. When it shines to the left, it scares off the seagull from the school's bell tower.
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.
You do not play as Big Nate. He accompanies you around most of the island, and races you on the jet skis.
You can't play "as" Nate, but everywhere you go on the island, he tags along.