I have had a CBB for 1 1/2 months.He was eating brine and small bits of mysis in the vendors tank.I purchased him from Sedar at Phishy Business.Sedar kept him for a month before sending him to me.Although he shows a great deal of interest at feeding time,I have never actually seen him eat anything.He is very active and healthy,and has gained weight in the time I have had him,so he must be eating something.Since he loves to pick at the rocks,I am sure he eats food that falls onto them.I had 2 small aptasia-about an inch- that he showed no interest in,but they suddenly dissappeared 4 days ago.