Use fiddler crabs, hermit crabs, green crabs, mole crabs, or just about any kind of crabs you can catch, put 'em on a bottom rig with a #3, 4 or 5 hook, use a wreck anchor over the tube, close but not too close to the 1st, 2nd, 3rd, 4th island of the CBBT; 10 to 20 ft of water is good. Use enough weight to get in the rocks. The swifter the current, the deeper the water, the more weight and versa vice. Good luck. Oh, by the way,

I caught a 10 pounder 50 ft off of the 1st island today on a fiddler.