Futurama (1999)

S2E9 Why Must I Be a Crustacean in Love?

During the Decapodian mating season, Dr. Zoidberg spirals into chaos, prompting Fry to step in and help him learn the art of seduction. However, things take an unexpected turn when Zoidberg's crush becomes infatuated with Fry instead. This leads to a fierce showdown, as Zoidberg confronts Fry, demanding a duel to the death over the affections of his intended partner.