1 Department of Biology, University of Naples Federico II, Via Cinthia 26, 80126 Naples, Italy.
2 Department of Biology, University of Naples Federico II, Via Cinthia 26, 80126 Naples, Italy; Physics and Biology Unit, Okinawa Institute of Science and Technology, Graduate University, 904-0495 Okinawa, Japan. Electronic address: michi.kuba@me.com.
Octopuses inhabit almost all seas in the world. A new study on tropical species suggests that, as in vertebrates, folding in the brain and visual system might be linked to habitat and lifestyle.