Mark D. Tetrick and Crystal C. Tetrick have listed for sale a two-bedroom, one-bath home at 6041 Seconnd Ave. N.W. in Ballard for $509,000.

The 930-square-foot house in the West Woodland Park subdivision was built in 1920. Beth Bylund of Windermere Real Estate Company is the listing agent for the house.

Mr. Tetrick is a manager of aquatic lab services and research hatchery operations for the University of Washington School of Aquatic Fishery Sciences. He also was a manager for the Salmon in the Classroom program.

He received his bachelor's degree in political science with a natural resource policy emphasis from UW's Center for Water and Watershed Studies.

Ms. Tetrick is an associate director for health care operations at the Seattle Indian Health Board.

According to BlockShopper.com, there were 342 sales in Ballard in 2008, with a median sales price of $404,000.