Poaching Lobsters

A poor man was poaching lobsters at the beach. A game warden, his first day on the job, saw him and said: “I’m going to have to arrest you. Poaching is illegal.”
“I’m not poaching lobsters.” the man said. “These are my pets. I’m exercising them. I throw them into the sea, then whistle, and they come back.”
“Show me,” the warden said in disbelief.
The man threw the lobsters into the water and started to walk away.
“Wait!” the warden shouted. “Don’t you have to whistle to call the lobsters back?”
The man looked at the warden, paused, and said, “What lobsters?”