I haven't seen the show in a while but I always enjoyed watching it when I did.
From watching the video in the first article, I'd say the oldest son has other aspirations and probably had a rough childhood living in his father's limelight (a light that was obviously there before the show). The youngest son seems like he always had something to prove to dear old pop.
I hope all works well with both of them. I'm not sure I'd want to endure the trials and tribulations of crab fishing. My hat is off to those that do.
Live Long and Prosper!