SYDNEY, July 28 (UPI) --If a male cuttlefish looks angry, he probably is angry. New research suggests cuttlefish don't play emotional games. They're not bluffers. If they want to fight, they'll let ...

Cuttlefish, along with octopuses and squid, are cephalopods—animals from an ancient branch of the tree of life that have been trolling the oceans for more than 500 million years. Cuttlefish were ...