My Brother-in-Law sent me this.

A marine biologist developed a race of genetically engineered dolphins that could live forever if they were fed a steady diet of seagulls. One day, his supply of the birds ran out so he had to go out and trap some more. On the way back, he spied two lions asleep on the road. Afraid to wake them, he gingerly stepped over them. Immediately, he was arrested and charged with... transporting gulls across sedate lions for immortal porpoises.

Thanks Vic