Given the task definition and input, reply with output. In this task you are given a short story and a question regarding that story. You must answer the question based on the events of the story. Try to use the same words in the story to answer each question. You should completely answer the question in a short answer. Do not include information that is unnecessary to answer the question.

Oliver had a pet fish. He noticed that one fish seemed almost pregnant. One day, little baby fish appeared in the tank. His fish had had babies! Oliver named all of the fish and loved them all.
Why did Oliver name all of the fish?
He named all of the fish.