"Lobsters" joke

After a day fishing in the ocean a fisherman is walking from the pier carrying two lobsters in a bucket. He is approached by the Game Warden who asks him for his fishing license.

The fisherman says to the warden, "I did not catch these lobsters, they are my pets. Every day I come done to the water and whistle and these lobsters jump out and I take them for a walk only to return them at the end of the day."

The warden, not believing him, reminds him that it is illegal to fish without a license.

The fisherman turns to the warden and says, "If you don't believe me then watch," as he throws the lobsters back into the water.

The warden says, "Now whistle to your lobsters and show me that they will come out of the water."

The fisherman turns to the warden and says, "What lobsters?"