Maryland officials will expand a program that grows baby oysters in cages then plants them on reefs. Eleven more tributaries in Southern Maryland, Anne Arundel County and the Eastern Shore will be included in the expansion. The program, called Marylanders Grow Oysters project, currently operates on piers in the Tred Avon River in Talbot County. With the new waterways, the state Department of Natural Resources shellfish program will move their workload to 13 local groups. According to DNR, more than 175 people in the Tred Avon program took care of about 850 cages filled with between 500 and 1,000 baby oysters, known as spat.