A tiny freshwater crab found in New Zealand's Hoteo river has three eyes and an antenna-like structure on its back, the first creature found with such deformities, according to researchers. Humboldt University of Berlin's Gerhard Scholtz, who also found that the crab's brain was unusually small and deformed, thinks the crustacean started out as conjoined twins with two pairs of eyes, one of which was situated between the normal pair while the other was pushed to the back, later regenerating into the antenna-like structure.

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New Scientist

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