...A. J. Shohet; R. J. Baddeley; J. C. Anderson; E. J. Kelman; D. Osorio SUMMARY Low-level mechanisms in vertebrate vision are sensitive to line orientation. Here we investigate orientation sensitivity in the cuttlefish Sepia pharaonis , by allowing animals to settle on stripe patterns. When...

... over large volumes of relatively unproductive ocean (low power density, Wm −3 ). A survey of locomotor performance among phyla and along an ‘evolutionary continuum’ of cephalopods ( Nautilus, Sepia, Loligo and Illex ) suggests that increasing speed and animal power density are required if animals...

...William M. Kier; John B. Messenger; Jaleel A. Miyan ABSTRACT Little is known about mechanoreceptors in cephalopods. The anatomical data are fragmentary; Graziadei (1964) described multipolar nerve cells in the arms of Octopus and the lips of Sepia and similar structures have been described...