A man is walking from the lake carrying two fish in a bucket. He is approached by the game warden, who asks to see his fishing license.
The fisherman says to the warden, “I did not catch these fish; they are my pets. Every day I come down to the water and whistle, and these fish jump out, and I take them around to see the sights, only to return them at the end of the day.”
The warden, not believing a word of it, 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 just watch.” He then throws the fish into the water.
The warden says, “Now whistle to your fish and show me that they will come out of the water.”
“What fish?” asks the fisherman.