Bombay Reef, Coral atoll in the Paracel Islands, Sansha, China

Bombay Reef is an atoll at the southern end of the Paracel Islands' Xuande group, enclosing a lagoon strewn with rocks and mostly less than 10 metres deep, with a maximum depth of 17 metres. The reef runs about 10 miles east to west and is steep-to, with a lighthouse at its south-west end.

HMS Aire, a River-class frigate en route from Hong Kong to Singapore for decommissioning, ran aground on Bombay Reef in the early hours of 20 December 1946. Spotted by chance three days later by HMS Bonaventure, all 85 crew and the ship's dog were rescued without serious casualties. In May 1967 the schooner Dante Deo was wrecked here and its crew rescued by a 37th Air Rescue Squadron amphibious aircraft.

The reef's Chinese name, Langhuajiao ("wave-flower reef"), comes from the band of breaking waves over the shallow coral heads, and it is also called Pengbojiao; in Vietnamese it is Đá Bông Bay, "flying-flower rock". Its four Chinese territorial-sea base points were declared in 1996.

Bombay Reef is not a visitor site: it is administered and patrolled by Chinese border police, and its lighthouse stands at the southwest end of a steep-to reef 10 miles long. The reef lies near an international shipping lane, and at least one wreck is visible above water and on radar from 15 miles away. Approach only with official clearance.

The lagoon is shallow, reaching only 17 m at its deepest and mostly under 10 m, and its sand has been noted as easy to extract, a ready material source for artificial island building. The reef's four Chinese territorial-sea base points were declared in 1996.