Tampa Bay hosts free Halloween fest, ghost tours, and rescheduled Oktoberfest this weekend

The Florida Aquarium wraps its Guppyween celebration Saturday from 9 a.m. to 5 p.m., featuring costumed divers and underwater pumpkin carving. Children in costume enter free and can participate in a scavenger hunt and trick-or-treating activities.

USF St. Petersburg hosts its fifth annual Halloween Fest Friday from 5:30 p.m. to 8:30 p.m. at 140 Seventh Ave. S. The free event includes trunk-or-treating, a haunted petting zoo, and face painting. Registration is encouraged but not required for the family-friendly gathering.

Curtis Hixon Waterfront Park hosts Oktoberfest Tampa from Friday to Sunday. The festival was postponed earlier this month due to weather. General admission starts at $10. Hours run from 4 p.m. to 11 p.m. Friday, 11 a.m. to 11 p.m. Saturday, and 11 a.m. to 6 p.m. Sunday. The program includes live music, German food, and a Halloween-themed Krampus dance party on Saturday.

Ghost tours operate at the Tampa Bay Hotel and Tampa Theatre this weekend. The Tampa Theatre offers two-hour tours on Friday and Saturday mornings. Tickets cost $15, or are free for members. The Tampa Bay Hotel hosts tours Friday and Saturday from 6 p.m. to 9 p.m. for $25 per person. The hotel tour is recommended for ages 14 and older.

Gulf View Square Mall in Port Richey hosts Mall-O-Ween Saturday at 9409 U.S. 19. Vendors open at 2 p.m. Trick-or-treating runs from 5 p.m. to 8 p.m. Participants collect treats from local vendors and participating retailers.

The Reel Science series kicks off Sunday from 1 p.m. to 4:30 p.m. at the Corner Club at 1502 E. Sligh Ave. The event screens the 1997 film Dante's Peak. USF volcanologist Dr. Mel Rodgers discusses the scientific accuracy of the volcano thriller. Tickets are required for the limited seating.