Matt Koumaras was a musician/journalist who wrote the Notes from the Underground punk column in Metro Santa Cruz from 1997 through 2000 and played in many Santa Cruz, California bands including the Exploding Crustaceans, Headcheese, The Levis, and The Sealants.

Known for his strange facial expressions especially with the Exploding Crustaceans, Jolt-cola dance moves and two note guitar leads, Koumaras became an instant sensation with the over 60 Golden Girl crowd. The band was banned from Gilman for its stage antics and questionable lyrics in 1992. Fans included future members of the Distillers and Born Dead. The Crustaceans played many shows in the San Francisco Bay area such bands as the Swingin' Utters, Good Riddance, Zeke, Meatmen, and more.

Koumaras began recording solo albums under the moniker King Uno in 2007.  The first release was a series of prank calls to fellow bandmate Joe Gabent of the Exploding Crustaceans, SA90 and the History Lesson. The results were mixed but did land Uno a chance to open for Andrew W.K.   He has released three solo albums Hail to the King, Epic Rien and Numero Uno with his daughter Grace Koumaras on lead vocals. 

Koumaras was the vocalist/guitarist involved with the Sealants from Santa Cruz which later became SA90 when Koumaras moved to San Diego.

Koumaras as the Executive Director of the Boys & Girls Club of Santa Cruz from 2003-2007 and helped secure funding for their music recording studio helping also to bring in the Beastie Boys for the kids.

He currently resides in Oceanside and plays guitar for the the San Diego based punk alternative band Pictographs. The band has played a handful of shows in northern San Diego County currently has a 4-song EP. The band is currently working with Ed Stasium (producer Ramones, Misfits, etc) for a movie soundtrack.