Hardeep Wreck

The Hardeep Wreck, also known as the HTMS Hardeep or Suddhadip, is a shipwreck dive site in the waters off Pattaya, Thailand. The wreck sits upright and its structure spans from a maximum depth of 26 m up to shallower sections around 10 m, with the upper mast, deck edges, and superstructure rising well into the mid-water column. Rusted-out hulls, vertical bulkheads, shadowed compartments, collapsed zones, fallen beams, and broken interior sections give the site a complex, layered terrain that rewards slow, methodical exploration with a torch.

The wreck supports a dense and varied marine community year-round. Batfish — most often longfin or Teira batfish — are reliable residents seen on nearly every dive, hovering in pairs or small schools between roughly 10 and 22 m near the mast and upper decks. Snapper school in large, synchronized formations along the bow and mid-deck between 14 and 26 m, often surrounding divers on descent or ascent. Brown-marbled groupers hold territory in the deeper, darker sections of the hull between 18 and 26 m, while lionfish occupy shadowed compartments and layered beams throughout the structure. Six-banded angelfish, moray eels, stonefish, scorpionfish, trevally, barracuda, blue-spotted stingrays, hawksbill turtles, nudibranchs, ghost pipefish, cleaner shrimp, and whale sharks are also recorded at the site.

Water temperature ranges from 27–30 °C and visibility is generally good, with the best diving conditions running from November to April. Medium currents flow across the wreck, which keeps plankton feeders like batfish active along vertical structures and draws pelagic species such as trevally and barracuda. Low-current pockets inside the wreck's interior sections provide resting habitat for ambush predators like groupers and lionfish.