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
Little flying squid slightly less than half of the mantle length. The largest arm suckers have 9-11 sharp different sized teeth on distal two thirds of their rings. The height of the protective membrane on the arms is uniform and it is not higher than that of the suckers. The manus of the tentacles has 6-8 sucker rows in four series and the rings of the medial suckers on the manus have 16-18 moderately large, subconical teeth which alternate with low plates and are around 2.5 times largers than the marginal suckers in diameter. On the tentacles the protective membranes extends to the