Located on the east end of Dauphin Island. Open Mar. 1—Aug. 31 M—Sat. 9—6, Sun. 12—6; Sep. 1—Feb. 28 M—Sat. 9—5, Sun. 1—5. Group rates, senior discount, child rates, AAA discount. From the swamps to the seas, the Estuarium invites you to learn all about the coastal environment. We’ve got all there is to “sea.”