65th Anniversary Mermaid Reunion: The mermaids of Weeki Wachee are celebrated in this reunion that includes performances with current and former mermaids at noon, 1:30 and 3 p.m. at Weeki Wachee Springs State Park, 6131 Commercial Way, Weeki Wachee. Regular admission: $13, $8 ages 6-12, 5 and younger free. (352) 592-5656.
Extreme Mud Wars: Watch as competitors sling mud in this two-day event. Activities range from an obstacle course, joust pit, belly bumper pit and mud tug-of-war to football, dodge ball and a ball crawl. Bonus: This year there's a beer tent. It kicks off at 11 a.m. at Spa Beach, 615 Second Ave. N, St. Petersburg. Free for spectators, $400 team.
Gulf Maritime Festival: This event showcasing gulf coast folklife from Cortez to Apalachicola has demonstrations on sponge diving and processing, making sponging equipment, fishing, clam farming and boat building. There's also Greek music, dance, and food at 11 a.m. at Tarpon Springs Sponge Docks in Tarpon Springs. Free. (727) 942-5605.
Hot Tuna: Former Jefferson Airplane members Jorma Kaukonen and Jack Casady make up this acoustic and electric blues outfit. They perform at 8 p.m. at the Straz Center for the Performing Arts in Tampa. $32.50. (813) 229-7827.
An American Girl: McKenna Shoots for the Stars, 8 p.m., NBC Something about a gymnast based on a doll. We don't know. There are probably plenty of commercials to explain it to us.
George Lopez: It's Not Me, It's You, 10 p.m., HBO George Lopez has a standup special. It's a good thing he doesn't have Conan O'Brien leading in for him tonight, or else HBO would cancel him.
More to explore
Find movie listings at tampabay.com/things-to-do/movies.