Book an Appointment with Discovery Wharf at Maine Center for Coastal Fisheries: Welcome to Discovery Wharf at Maine Center for Coastal Fisheries. Immerse yourself in all things fisheries. Our opening day is Tuesday, June 22. Please proceed to complete your private 45-minute reservation. DW is open Tuesdays, Thursdays, and Saturdays. This hands-on experience is free; a suggested donation of $10 is greatly appreciated. We encourage all visitors to read our terms and conditions (subject to change) prior to your visit. We can't wait to see you!