Waikiki Aquarium is throwing a Halloween-themed after-hours party this Saturday, good news for Oahu families looking for something to do with the kids.

• "Stranger Fins" takes over the aquarium Saturday evening, with the building styled after the Upside Down.
• The lineup includes a costume contest, face painting, underwater pumpkin carving, a candy crawl for kids, and games like Nemo cornhole.
• An 80s dress-up theme runs through the night, and conservation groups will be on site with a passport activity to teach kids about marine life.
• Tickets are cheaper for aquarium members, with discounts for kids and free entry for the youngest; proceeds go to the aquarium's research and education work.

Outlook: Doors open at 5 p.m. Saturday and run until 8, with tickets sold online and at the door.