Grabbers as they were dubbed in Bloodlines are sentient, independent parts of the Queen graboid.
Hunting and ScienceEdit
Able to hunt on their own, they can climb up rocky surfaces and strike where their "Host" can not. However, this leaves them more vulnerable to being attacked. They would also be useful in warning off possible scavengers from the Graboid nests.Parasites like the Cymothoa exigua or tongue-eating louse commonly found in fish, have been known to form attachments to host creatures for food and shelter. Whether this means that all tentacles of the graboid species are in fact some form of parasite is unknown.