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Anglerfish and the Absolute Worst Reproduction Method on Earth

Scientists have now found that deep-sea anglerfish has evolved a mode of sexual parasitism for reproduction. Males of the species permanently attach themselves to females through a form of anatomical joining, otherwise not seen in nature.

The tiny male anglerfish fuses its tissues to a more massive female during copulation, allowing the two to share not only sperm but even blood and skin. Some of the anglerfish species lack key genes that make fusion without consequences possible.