The Amphibian Man is a 1962 Russian film based on A. Belyev’s novel of the same name. The film is summarized well here, although it diverges quite a bit from the book through the introduction of a central romance plot and new female character. This visually brings out the parallels between the beautiful and somewhat androgynous Icthyander (the amphibian man) and Gutiere, his romantic interest, who is also pursued by a greedy ship captain. Her resistance to marriage and his resistance to capture by the same captain clearly mirror each other.
This could be a viable chapter topic. I am impressed by the beautiful story by Julio Cortázar called Axolotl, about a man’s encounter with a larval newt at an aquarium and his sudden… shall we call it teleportation?… behind the glass into an axolotl. Reminiscent of Kafka, Capek, and Flusser, this is a great story about metamorphosis and inter-species sympathies and barriers.