The group initially included guitarists Scott Metzger and Andrew Southern, bassist Matt Kohut (formerly toured with Ween), and drummers Pete Cottone and JP Wasicko.
The group played a series of concerts in 2001, including a benefit for murdered Phish fan Kristin Laurite at the Stone Pony in Asbury Park, New Jersey.
The show, hosted by Kevin Cassels of The Pharmer's Almanac, was to be released as a live album, but Marshall temporarily retired Amfibian at the end of the year.
Three years later in 2004, Marshall reformed a completely new Amfibian with guitarist/vocalist/keyboardist Chris Metaxas, drummer Joe Larsen, bassist Bob Kay as well as guitarist Anthony Krizan, and released the band's first studio album, From the Ether, in the spring.
The album features Phish leader Trey Anastasio, as well as contributions from former Amfibian members Chris Metaxas, Benjamin Clapp, Mark Varga, and Thorp Rivingston.