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 ...

There are more than 120 species of cuttlefish. They are found in the order Sepiida and are grouped into six families divided between two suborders. Depending on the species, cuttlefish range in ...

Duke biologist Sarah Zylinski wants to better understand how cuttlefish see the world. Like their relatives octopus and squid, cuttlefish are master camouflagers—and Zylinski says you can learn ...

The cuttlefish is often called the chameleon of the sea, but where the land-based version can only change its color, the sepia-squirting, tentacled one can change its skin texture as well as its tint ...

Cuttlefish wave their expressive tentacles in four distinctive dancelike motions, a new study finds—possibly to communicate visually and by vibration. These marine invertebrates, which have eight ...

Source: Adam Dewan, via Flickr. Distributed under a CC BY-NC-SA 2.0 license. Cuttlefish, like their fellow cephalopods squid and octopus, are known for their intelligent and complex behaviors.