"The Lobster Trick" joke
After a day of ocean fishing, a fisherman is walking from the pier carrying a bucket which contains two lobsters. He's approached by the Game Warden who asks to see his fishing license.
"Oh, I didn't catch these lobsters," the man says, "they're my pets. I come down to the water every day and whistle and these lobsters jump out. Then, I take them for a walk and return them at the end of the day."
The warden, not believing a word the man said, 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.
"Ok, now whistle to your lobsters and show me that they will come out of the water," instructs the warden.
The fisherman turns to the warden with a sly grin and says, "What lobsters?"