Octoboos are ghostly sub-species of Octoombas that appear in Super Mario Galaxy 2. They are enemies that appear in the Haunty Halls Galaxy and Boo Moon Galaxy. In the first level " A Glimmer of Bulb Berry", they are the first enemies to be encountered. They can be found in groups encircling a particular area. In the second level "Sneaking Down the Creepy Corrider", Boo Mario has to avoid these enemies in order to get through the area. Octoboos look like white, legless Octoombas with a ghost's tail. They guard a set area, and can become transparent. This makes them avoid any attack.