The vampire squid (Vampyroteuthis infernalis, lit. “vampire squid of Hell”) is a small, deep-sea cephalopod found throughout the temperate and tropical oceans of the world. They reach a maximum overall length of approximately 1 ft. (30 cm). A unique “webbing” of skin connects its tentacles.They are known to reside at depths of between approximately 2,000-3,000 ft. (600-900 m); possibly even deeper. They are the only known cephalopod to not feed upon live prey. Instead, they feed upon the detritus that sinks to the ocean depths; typically the remains of salps and crustaceans. Their coloring ranges from a pale reddish to a “velvety” black.Unique retractile sensory filaments justify the vampire squid’s placement in its own order: Vampyromorphida (formerly Vampyromorpha), which shares similarities with both squid and octopuses. As a phylogenetic relict it is the only known surviving member of its order, first described and originally classified as an octopus in 1903 by German teuthologist Carl Chun, but later assigned to a new order together with several extinct taxa.