The Solomon Archipelago is a terrestrial ecoregion and marine ecoregion in the Pacific Ocean. It includes the tropical ocean waters surrounding most of Solomon Islands (excluding the Santa Cruz Islands, which is a part of the Vanuatu marine ecoregion with the forests being part of the Vanuatu rain forests ecoregion), and includes Bougainville Island, Buka, and the Tabar Islands of Papua New Guinea and their surrounding waters.