The following is a list of unnamed Gamma Quadrant nebulae.
Dominion staging area
Nebula used by Dominion as a staging area
This nebula was used by a Dominion fleet, including several Jem'Hadar battle cruisers and Jem'Hadar fighters, as a staging area prior to their invasion of the Alpha Quadrant. The fleet was discovered in the nebula by Worf and Elim Garak before the two were captured by the Dominion and taken to Internment Camp 371. (DS9: "In Purgatory's Shadow")