Berkely Boy,
Most of the crab I've seen come off the docks in the north end of the canal (up by the bridge) have been Red Rocks with a few dungy mixed in. At the south end of the canal you get more dungy than the red rocks.

I was out last weekend and did real well, But Unfortunately right now it seems a lot of the crabs are coming off a molt... so you'll get a lot of soft shells that need to go back.