Hia Sang Wreck, Réunion: Deep exploration on a scuttled vessel

The Hia Sang, also known as Hai Siang, Hai Hsiang, or Hïa Sïang, is a significant deep wreck off the west coast of Réunion. This Taiwanese lobster boat, scuttled intentionally in the 1980s, now lies flat on the seabed at a depth of 55 metres, with its masts still clearly visible. You approach the site via boat, making an open blue water descent directly to the wreck, a profile that immediately signals the offshore nature of this dive.

The wreck itself presents as a substantial artificial reef structure, offering a complex environment for exploration. While initially reported to have settled on its side, the Hia Sang now rests upright, a position that some attribute to the force of a past cyclone. This orientation allows for a more traditional wreck penetration experience, though its depth and the surrounding conditions demand a calculated approach to bottom time and gas management.

As you descend towards the Hia Sang, the transition from blue water to the visible silhouette of the vessel is a defining moment of the dive. The deep environment attracts a notable array of pelagic life. You can often encounter large schools of snappers and trevallies congregating around the structure, while tuna and barracuda patrol the open water columns surrounding the wreck.

The exposed offshore location of the Hia Sang means current conditions are variable, often shifting from mild to strong. This variability is a direct consequence of the site’s position on the west side of Réunion, subject to local sea states and oceanic movements. Planning for potential currents, particularly during descent and ascent, is a fundamental aspect of diving this site safely.

Beyond the wreck's immediate vicinity, the surrounding deep sand flats can reveal other unique encounters. Stingrays are often observed resting on the bottom, and scorpionfish camouflage themselves on the wreck's surfaces. The presence of larger pelagics like eagle rays and manta rays is a highlight, and you might even spot the elusive mola mola or, on rare occasions, a whale shark during your deeper excursions or decompression stops.

The Hia Sang is recognized as one of Réunion's signature deep wrecks, a classic advanced dive that draws divers seeking both substantial artificial reef exploration and potential large animal encounters. Its appeal lies in the combination of a significant man-made structure providing shelter and aggregation for reef life, juxtaposed with the open ocean environment that brings in passing pelagics.

Managing your profile on the Hia Sang requires discipline. With a maximum depth of 55 metres and a minimum of 54 metres, this is definitively a technical dive. The surrounding blue water during ascent and descent phases means precise buoyancy control and maintaining awareness of your dive team are crucial, particularly if currents are present.