Ultraviolet Hippopotamus, a five-piece progressive improvisational band with a rapidly growing fan base across the U.S. and Europe, will play Otto’s Niteclub & Underground on Dec. 1.

Described as “brightening the future of the jam band scene,” Ultraviolet Hippopotamus mixes tight, funky jams with new dance beats, heartfelt lyrics, compelling composition, eccentric effects and a vibrant light show for a one-of-a-kind musical experience. The band performs an eclectic selection of technically demanding compositions and improvised material along with unconventional and fun covers.

The group journeys between funk, jazz, livetronica, space rock, reggae, bluegrass, and progressive rock within a single show and, sometimes, within a single song.