How do you get the giant pearl inside the grabber in clubpenguin?

You have to go to the place where the clam is. The clam is on the left and a big rock is on the right past the fish. Grab the rock and bring it to to the clam. When the mouth opens drop the rock in the mouth and grab the pearl. Then leave and drop it into the net. If the big red fish is in your way, catch the small yellow one at the bottem and get rid of the big one.