Boo! In The Blue

Sat. October 22, 2022 - Sun. October 23, 2022 11:00 am - 4:00 pm

It's not Halloween without Boo! In The Blue

The Texas State Aquarium is thrilled to welcome you back for Halloween under the sea with its annual Boo! In the Blue event on Saturday, October 22nd, and Sunday, October 23rd All activities are included with admission or membership, and children (ages 3 to 12) in costume will get a 50% admission discount* with the purchase of a full-priced adult admission. Membership admission is not applicable for child discounts.

Some spooky décor will bring a Halloween ambiance to the Aquarium experience. Underwater skeletons, jack-o-lanterns carved with ocean creatures, and giant shark jaws covered in cobwebs will all make for some fin-tastic photo ops. 

Buy Tickets

Event Schedule

This unique event will include a variety of not-so-scary, family-friendly activities, including spooky décor throughout the Aquarium, fun photo backgrounds, a virtual costume contest, divers in costume, animal enrichment and encounters, and of course… candy!  

The Aquarium will be open from 10 a.m. – 5 p.m. on both days with “Boo! In The Blue” activities from 11 a.m. – 4 p.m. To purchase tickets to “Boo! In the Blue” in advance and skip the line, visit 


Virtual Costume Contest

A virtual costume contest will be held during the weekend of the event, October 22nd and 23rd. Boo!

Winning is super easy!

  1. Come to the Aquarium during our Boo! in the Blue Event between October 22 and October 23 and take a picture of your amazing costume!*
  2. Submit your photos using the hashtag #txstateaquarium and tag us @txstateaquarium on Instagram or Facebook
  3. Follow us on Instagram or Facebook.
  4. The winner will be announced on October 31 for the three best costumes!

* Only kids up to 13 years old will be considered for the Boo! in the Blue virtual costume contest.

For more information about the contest click here.

Virtual Costume Contest

Boo! In The Blue is presented by Whataburger