According to the vessel's Web site, Capt. Phil Harris was stricken Friday night. Harris was flown to Anchorage and underwent surgery over the weekend. His sons, Josh and Jake, joined him there.
The Web site account says it may be some time before "anything substantial" is known about Harris' condition.
The Discovery Channel cable television reality show depicts the crab fishing industry in the dangerous waters off Alaska.
The Web site reports a family friend, Derek Ray, has flown to St. Paul to take over the role of relief skipper for the rest of the opilio crab season.