Celebrating the actual 25-year anniversary of the St. Lucie County on Friday, Aug. 28, the Aquarium will again offer complimentary admission from. In addition, the Aquarium will open early and provide light refreshments to visitors from 9 to 10 a.m. Throughout the day, visitors will be able to join one of the ever-popular fish feeding tours (10:30 a.m. and 2:30 p.m.) or a behind-the-scenes look into how the Aquarium’s ecosystems are cared for (11:30 a.m. and 1:30 p.m.).