The Louisiana Seafood Festival rounds up vendors to serve more than 50 dishes from locally sourced fish, oysters, crawfish and shrimp. Don’t miss the live music, kid’s activities, art village and cooking demos. Friday, Saturday and Sunday from 11 a.m. to 7 p.m. at City Park’s Festival Grounds. louisianaseafood

Southern Decadence fills the French Quarter and Marigny all weekend. Official events include the float parade on Friday at 8 p.m., starting at Washington Park and rolling down Decatur to Canal; and on Sunday, a walking parade that begins at 2 p.m. at Decatur and Barracks.

Labor Day weekend marks 25 years since the Aquarium of the Americas opened, bringing sharks, sting rays and sea turtles up close. Second-lines, games, mermaids and discounted admissions will mark the occasion. Saturday, Sunday and Monday, 9 a.m. to 9 p.m. (504) 565-3033.