Put on your coolest costume and head down to our Halloween bash! Adults will take over the entire Seattle Aquarium for this 21+ event, featuring DJs, live music, a costume contest, opportunities to experience our habitats at night, a variety of Halloween-themed activities throughout the Aquarium, a no-host bar, food available for purchase and more.

Experience a frighteningly fun time for the whole family at the Aquarium this Halloween! It’s no trick that we’ve got a special treat for our guests this year: Come meet characters from Nintendo’s Animal Crossing: New Horizons and take photos with them.  

And join us for some of the Aquarium’s Halloween traditions like underwater pumpkin carving and trick-or-treating at SEAlebrity habitats. Costumes are welcome and encouraged!

Join volunteer naturalists along the Cedar River this October to see spawning salmon! Learn about our local salmon, the challenges they face and how you can help keep these special creatures coming back to the river where they were born.