Bring It Back Alive Puns

There was this scientist that discovered a way to keep porpoises alive forever. Problem was that he had to feed them baby sea gulls Well the sea gull was a protect species so he had to be careful. Well one night he was bringing some back to the lab. It was very dark and he ran over a lion that was sleeping in the middle of the road A cop sees all this and you know what he arrested him for ? Carrying underaged gurls across a staid lion for immortal porpoises

This is not original. I read it in a book of puns 40 years ago. I do not know which one I would like to give it credit but it was 40 years ago