How long are the king crab and opilio crab fishing seasons?

i was watching the Deadliest Catch on Discovery channel. I was just wondering how long the crab seasons last. It seems to last couple months at most.|||it is more like weeks, not months|||I would have to say that would depend on what body of water they are fishing in and what country has jurisdiction over that body of water and finally are their any treaties concerning the harvests of crab in that particular area?