Are there rules for the attacker to grapple multiple defenders? Can that attacker, with more than two arms, attack a new defender each round, or grapple many defenders as a full round action? I am looking for a RAW answer; if I have to I'll house rule it.
The creature I am making resembles a displacer beast, with six tentacles and a mouth like a lamprey. I would like to use the bite feature only if the defender is grappled; defenders breaking grapple will free themselves from the bite. While it can only bite one at a time, should a defender break free it can then bite another.