A more elongated flexible organ present in animals, especially invertebrates. Usually, tentacles are used for feeding, feeling and grasping. Anatomically, they work like other muscular hydrostats.
Tentacles shouldn't count as a person, unless they are attached to someone, like in post #41612. Therefore most tentacles on person pics shouldn't be tagged straight/gay/lesbian. If there is only one person besides tentacles then pic should be tagged solo.