Firefighters, emergency medical technicians (EMTs), police officers, correctional officers, 911 dispatchers, and sheriff’s deputies receive free admission on September 11. The Aquarium celebrates our nation’s first responders on September 11. Firefighters, emergency medical technicians (EMTs), police officers, correctional officers, 911 dispatchers, and sheriff’s deputies with valid ID receive free admission. Contact your union or association to purchase discounted tickets for friends and family.