Coral Wall (Hon Mun) – Nha Trang Dive Site

Site Overview

Coral Wall on Hon Mun Island is a biodiversity hotspot that showcases the extraordinary soft coral and invertebrate diversity protected within the Nha Trang Marine Park. The moderate wall formation descends from 6 to 20 metres, its entire surface blanketed in colourful soft corals, sea fans, sponges, and tunicates that create a living tapestry of underwater colour. Nudibranch diversity is exceptional, with multiple chromodoris species, phyllidia, and rare aeolids documented across the wall face by dedicated macro divers and researchers. Green and hawksbill turtles are frequent visitors, gliding gracefully along the wall to feed on the abundant sponge growth and occasionally resting on ledges. Flatworms display their vivid colour patterns on the wall surfaces, while small sea fans and black coral trees add structural complexity to the invertebrate gardens. The shallower sections at 6 to 10 metres feature bright hard corals and schooling reef fish that provide an excellent safety stop environment and snorkelling opportunity. The wall's orientation captures ambient light beautifully, making it one of Nha Trang's best sites for underwater photography combining wide-angle wallscapes with macro invertebrate portraits. The protected marine park status ensures the soft coral communities remain healthy and vibrant, representing some of the best-preserved wall ecosystems in Vietnam's coastal waters.