Male Blue-Lined Octopus Uses Venom to Conquer Mates
2025-03-16
A groundbreaking study reveals a unique mating strategy in the blue-lined octopus (Hapalochlaena fasciata): males inject females with tetrodotoxin during mating, temporarily paralyzing them to avoid being cannibalized. This differs from other species' use of venom for hunting or defense; it's a unique reproductive application. Researchers observed males precisely biting near the females' aorta to inject the venom. While deadly to most animals, females have evolved resistance, ensuring successful mating. Male venom glands are significantly larger, suggesting a need to overcome female resistance. This study highlights an evolutionary arms race between sexes for reproductive success.