my yellow watchman/pistol shrimp were like that at the beginning. now they rule the roost. my Y. Watchman was about an inch when i got him, i had a nano 10g then 45g now and hes close to 4-5 in and will hover over the pistol (who is also huge now) all over the tank. its his own little not-so-secret service. but they have holes and burrows interconnected all over the tank. hes totally used to me now and doesnt run unless i get the camera (giant eye). when i was target feeding i used a 60cc luerlock syringe and a 15in piece of rigid airline tubing, i connected the two with about an inch maybe a little less of the flexible silicon tubing. i used it for everything, corals and shy fish, plus i can get a nice cloud of mysis out around the bubble tip and the clarkii's shoot out and grab it for the nem. that way i know they have a chance to feed the bta and themselves