Parasitic castration

Crab with egg sac of the parasitic barnacle Sacculina carcini. The parasite stops reproduction in its host, the crab, and stimulates the female crab to disperse parasite eggs with the same behavior that she would normally use for her own eggs.[1]

Parasitic castration is the strategy, by a parasite, of blocking reproduction by its host, completely or in part, to its own benefit. This is one of six major strategies within parasitism.

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