5 Why Must I Be a Crustacean in Love?

Zoidberg's recent aggressive behavior indicates it is mating season for his species. Zoidberg goes with the crew to his home planet of Decapod 10 for the mating frenzy, but his erotic display fails to attract any mates, including a female Decapodian and an old acquaintance of Zoidberg's named Edna. Fry teaches Zoidberg how to win Edna's heart through romance, but she begins to grow attracted to Fry instead upon learning that he is responsible for Zoidberg's romantic behavior. Enraged, Zoidberg challenges Fry to a fight to the death over Edna's affections, but the other Decapodians leave partway through the fight to participate in the mating frenzy, including Edna, who mates with the Decapodian king instead. Having missed out on the mating frenzy, Zoidberg reveals that everyone who participates in it dies after laying their eggs and apologizes to Fry.
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