Tried him with garlic, and entice soaked into his food since the second day no responce,tried him on mysis .Have not tried him on brine shrimp ,will buy some in the morning.As far as I can tell he buries himself under the sand at about 7 oclock every night and does not come back out until about an hour after the lights come back on in the morning ,and hes not afraid of the porcie at feeding times I had to feed the puffer by hand or he would not get any thing as the wrasse would barge him out of the way and scoff the lot.