Dr. Benchley is addressing the Ladies Club on the reproductive behaviors of the polyp, a little marine organism. Although he is unable to display his real-time specimens, he has prepared a series of photos of his subjects. He explains that the topic is made much more difficult by the truth that polyps have the ability to transform their sex every so often. Then he offers a few of the pictures of his samplings and the experiments that he has actually done with them. (IMDb).