The subject of this article is Bungie Lore; one of the many myths, legends, and easter eggs that have been created by Bungie.
Soffish is a water-absorbent toy fish. Soffish was first found here on Bungie.net. The reasons why Bungie seems to have an obsession with Soffish remain a mystery. It was actually purchased by Matt Soell at a dollar store; it has now been 10 years since the purchase. Matt had in fact bought two Soffishes, at the American Science & Surplus Store in Chicago. "In hindsight," he says, "I wish I had bought their entire stock." Soffish apparently went missing during Bungie's transition to Washington, and has yet to be found. Matt Soell posted this information in this thread.
According to Stosh, Sketch still has the box. Stosh revealed all of this in the thread here.