Cephalopod eight or ten. Decapods such as cuttlefish and squid have five pairs. The longer two, termed "tentacles", are actively involved in capturing prey; they can lengthen rapidly (in as little as 15 milliseconds). In giant squid they may reach a length of 8 metres. They may terminate in a broadened, sucker-coated club. The shorter four pairs are termed "arms", and are involved in holding and manipulating the captured organism. They too have suckers, on the side closest to the mouth; these help to hold onto the prey. Octopods only have four pairs of sucker-coated arms, as the name suggests, though
Vampire squid If a predator were to bite off an arm tip, the vampire squid can regenerate it. They have eight arms but lack feeding tentacles, and instead use two retractile filaments in order to capture food. They combine the waste with mucus secreted from suckers to form balls of food. They feed on detritus, including the remains of gelatinous zooplankton (such as salps, larvaceans, and medusae jellies) and complete copepods, ostracods, amphipods, and isopods. Vampire squids have been found among the stomach contents of large, deepwater fish, including giant grenadiers, and deep-diving mammals, such as whales and sea lions. The Vampyromorphida