Isis was an American post-metal band, active from 1997 to 2010. Known for their distinctive blend of heavy metal, ambient soundscapes, and progressive rock, they were instrumental in developing the genre of post-metal. The band, led by vocalist and guitarist Aaron Turner, is particularly recognized for their album "Oceanic" (2002), a work that has been influential in the genre. Their complex, layered compositions and exploratory themes have earned them a significant place in 21st-century experimental rock history.