The Sex Life of the Polyp
Dr. Benchley is dealing with the Ladies Club on the subject of the reproductive habits of the polyp, a little water microorganism. Although he is unable to display his real-time specimens, he has prepared a collection of images of his topics. He explains that the topic is made much more complicated by the truth that polyps are able to change their sex once in a while. After that he offers a few of the pictures of his specimens and also the experiments that he has actually performed with them. (IMDb).