We bought a couple dungeness crab last week on Thursday from San Francisco Fish Co (in the Ferry Bldg). Each was a little over 2 lbs, and we steamed them for around 15 minutes or so.
Both crabs had the same problem. While steaming, several of the legs mysteriously fell off; the crab hadn't been moved at all, and the water was a gentle simmer. The weird thing is that they did not fall off at the joint: the legs just sheared cleanly slightly below the joint with the body. It's almost as if they didn't have enough calcium in their shells or something to stay together while being steamed.
I should add that the crab tasted a little funny, and not only that, the yield was extremely poor (due in part, I'm sure, to the fact that some meat leaked out while steaming).
Any thoughts on what happened? And how I can make sure this doesn't happen again in the future?
(BTW, when we put them in the pot they were definitely alive and moving.)