Mature adults have a pair of ear-like fins. These fins stand out from the lateral sides of the mantle. They serve as the adult's primary means of propulsion (moving around): Vampire Squid are said to "fly" through the water by way of flapping their fins. Their powerful beak-like jaws are as white as ivory. Within the webbing are two pouches. These pouches hide the tactile "velar filaments". The filaments are analogous to a true squid's tentacles, extending well past the arms, however, they are a different arm pair than the squid's tentacles. Instead, the filaments are the same pair that were lost by the ancestral octopuses.