Wow,those look amazing and have a great home.
I see those in the tourist-stores in South Carolina when we go there on vacation and I always feel sorry for them,but your crabs seem to have a great life.
I am totally ignorant to the fact they change shells,or ignorant to the life of a Crab,period,but it looks like fun..
"The cruelest animal is the Human animal"
3 kitties,Rocky(r.i.p my boy),Chico,Vinnie