Sea Center Texas has a 50,000-gallon aquarium where you'll see marine life of the Texas Gulf Coast, including Gordon, a 250-pound grouper, and sharks up to 12 feet long. There are also tanks with exhibits on other types of marine environments, including salt marshes, reefs, and a coastal bay. A shallow touch pool contains blue crabs, hermit crabs, snails, urchins, and other marine creatures that can be handled, and just outside the visitor center is a 5-acre wetland with elevated boardwalks and signs discussing the numerous birds and other wildlife you might encounter. The facility also operates a fish hatchery producing red drum (also known as red fish -- a popular sport fish). The Sea Center is a joint project of Dow Chemical and Texas Parks and Wildlife. Allow 1 hour.