Gobiodon histro is a demersal species that is found among the branches of Acropora corals, especially Acropora nasuta colonies (Munday et al. 1997, Munday 2002, Hobbs and Munday 2004). This species relies on Acropora nasuta for shelter, food and a site for reproduction (Patton 1994, Nakashima et al. 1996). Gobiodon histro competes with other Gobiodon species for access to colonies of Acropora nasuta (Munday et al. 2001). There are rarely more than two Gobiodon histrio individuals present per coral colony. The species conducts both protogynous and protandrous sex changes (i.e., can change sex in both directions) (Munday and Molony 2002).