Mellish Reef, being about 300 km to the east of the Northwestern Group, thus the most distant from the Australian continent of all the reefs and atolls of the Coral Sea Islands Territory, is not considered to be part of any group.
Arrecife Mellish, aproximadamente 300 km ao leste do Grupo Noroeste, polo tanto o máis distante do continente australiano de todos os arrecifes e atois do Territorio das Illas do Mar do Coral, non se considera parte de calquera grupo.