Moby Grape originally consisted of Peter Lewis, Jerry Miller, Bob Mosley, Skip Spence and Don Stevenson. All band members wrote songs and sang lead and backup vocals for their debut album Moby Grape (1967). In a marketing stunt, Columbia Records immediately released five singles at once, and the band was perceived as being over-hyped. Nonetheless, the record was critically acclaimed and fairly successful commercially, with The Move covering the album’s "Hey Grandma" (a Miller-Stevenson composition) on their eponymous first album. The second album, Wow/Grape Jam, released in 1968, was generally viewed as a critical and commercial disappointment, partially due to the unusual 2 albums for the price of 1 double-album packaging.
http://www.youtube.com/watch?v=B85fG51xmx0
http://www.youtube.com/watch?v=Ok9cJ8Dg424

After the departure of Spence, the remaining four members continued recording throughout 1968 and released Moby Grape ‘69 in January 1969. Spence’s "Seeing" (also known as "Skip’s Song") was finished by the foursome, and it is one of the highlights. Despite the collaborative effort to complete the song, the songwriting credit was left solely with Spence. Mosley and Lewis wrote some of their best songs for this album. Bob Mosley then left the group, shocking the remaining members by joining the Marines. The remaining three released their final album for Columbia, Truly Fine Citizen, in late 1969.
http://www.youtube.com/watch?v=NKf2QL1ILBM