The Southern Arizona Koi Association holds its 30th Annual Koi Show, featuring martial-arts demonstrations, dance performances and drumming by Odaiko Sonora, from 9 a.m. to 4 p.m., Saturday, Nov. 14; and 9 a.m. to 3 p.m., Sunday, Nov. 15. Free. Call 747-7278, or visit www.sakoia.org for more information.