The Roman Catholic Church in the lesser East African Indian Ocean states (not Madagascar) is composed of only a Latin hierarchy, without a proper ecclesiastical province but joined in a single episcopal conference,
comprising five exempt jurisdictions, i.e. directly dependent on the Holy See :

• three exempt dioceses (on Mauritius, Réunion and the Seychelles)
• two missionary pre-diocesan Apostolic vicariates (entitled to titular bishops) : one for the Comoros and Mayotte; the other in above Mauritius.

There are no titular sees.

All defunct jurisdictions have current successors.

There are also three papal diplomatic representations (in fact all vested in the apostolic nunciature (embassy) on Madagascar) :

• an apostolic nunciature to Mauritius
• an apostolic nunciature to the Seychelles
• an apostolic delegation (papal legation) to the Comoros;
  none to Mayotte or Réunion, as those depend on metropolitan France without full statehood.

• GCatholic.org Comoros.
• GCatholic.org Mauritius.
• GCatholic.org Mayotte.
• GCatholic.org Réunion.
• GCatholic.org Seychelles.
• Catholic-Hierarchy entry.