Shai Hulud is an American metalcore band formed in Pompano Beach, Florida, in 1995 then later moved to Poughkeepsie, New York. The band is named after the giant sandworms in Frank Herbert's novel Dune.
The two mainstay members of Shai Hulud are considered to be Matt Fox (guitar), who writes most of the band's musical and lyrical output, and Matt Fletcher (originally guitar, now bass), who assists in writing.