Vampire squid a human's inner ear) and ammonium-rich gelatinous tissues closely matching the density of the surrounding seawater. Like many deep-sea cephalopods, the vampire squid lacks ink sacs. If disturbed, it will curl its arms up outwards and wrap them around its body, turning itself inside-out in a way, exposing spiny projections. If highly agitated, it may eject a sticky cloud of bioluminescent mucus containing innumerable orbs of blue light from the arm tips. This luminous barrage, which may last nearly 10 minutes, would presumably serve to daze would-be predators and allow the vampire squid to disappear into the blackness without the
Cephalopod limb infundibulum and acetabulum causes attachment and detachment. Many octopus arm anomalies have been recorded, including a 6-armed octopus (nicknamed Henry the Hexapus), a 7-armed octopus, a 10-armed "Octopus briareus", one with a forked arm tip, octopuses with double or bilateral hectocotylization, and specimens with up to 96 arm branches. Branched arms and other limb abnormalities have also been recorded in cuttlefish, squid, and bobtail squid. Cephalopod limbs and the suckers they bear are shaped in many distinctive ways, and vary considerably between species. Some examples are shown below. For hectocotylized arms see hectocotylus variability. Cephalopod limb All cephalopods possess flexible