马斯克林深海高原是印度洋的海底高原，位于马达加斯加北面和东面，从塞舌尔向南延伸2000公里至留尼旺，面积逾115,000平方公里，深度8至150米，在其边缘以外是4000米深的深海平原。

The Mascarene Plateau is a submarine plateau in the Indian Ocean, north and east of Madagascar. The plateau extends approximately 2,000 km (1,200 mi), from the Seychelles in the north to Réunion in the south. The plateau covers an area of over 115,000 km (44,000 sq mi) of shallow water, with depths ranging from 8–150 m (30–490 ft), plunging to 4,000 m (13,000 ft) to the abyssal plain at its edges. It is the second largest undersea plateau in the Indian Ocean after the Kerguelen Plateau.