Get the Worm was a medium difficulty stamp in Club Penguin, only available to be obtained by members. In order to obtain this stamp, the player has to hit the top of the far right cave in Soda Seas, pick up the worm, and drop it into their net.
This stamp was released on July 26th, 2010, as one of the original stamps.
If you lose your worm, you can get another one. However, if you try to capture the Mullet and lose it, then you will not be able to get the worm again unless you restart the game.