The Bro Code apparently does not exist among wild cuttlefish. The first field video of male European cuttlefish (Sepia officinalis) getting physical over a female shows that they are not above stealing another guy’s girl.
Cuttlefish, cephalopods known for their ability to alter their skin color, have complex and competitive courtship rituals. While scientists have extensively studied common European cuttlefish fights over mates, observing such altercations has proven elusive outside of the lab.
In 2011, biologists Justine Allen of Brown University in Providence, R.I., and Derya Akkaynak of the University of Haifa in Israel lucked out. They were in the Aegean Sea off the coast of Turkey following a…
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