The discussion revolves around naming seven fish belonging to a user, with participants suggesting various thematic naming ideas. Themes proposed include the seven colors of the rainbow, the Seven Dwarfs, the seven deadly sins, and the Seven Wonders of the Ancient World. Other suggestions include names from literature, science, and even kitchen utensils. There is a humorous exchange about the personalities of fish, with some participants advocating for naming based on personality rather than a theme, while others enjoy the creativity of thematic names. The conversation also touches on the practicality of naming conventions and the idea of changing names frequently. Overall, the thread showcases a blend of creativity, humor, and light-hearted debate about naming conventions for pets.