Arno Wall - Arno Atoll

45m Max

25-50m Vis

boat

Site Overview

Arno Wall is one of the most celebrated dive sites in Arno Atoll, a steep drop-off covered in huge gorgonians and sea fans, with Napoleon wrasse, green turtles and bigeye trevally, and excellent visibility. The site is defined by a steep drop-off clad in huge gorgonians and sea fans, stepping down into the blue, creating an underwater landscape that rewards divers with every visit. Napoleon wrasse, green turtles and bigeye trevally cruise the wall, with grey reef sharks in the blue. Water clarity in this part of the Marshall Islands is frequently excellent, with visibility often extending well beyond 25 metres and a comfortably warm tropical temperature year-round. The combination of healthy hard and soft corals, nutrient-rich currents and sheltered reef systems makes Arno Wall a reliable location for both macro photography and wide-angle encounters. Local dive operators run regular trips to the site from nearby bases, and the geography means conditions are suitable across a range of experience levels with appropriate guidance. Conservation is taken seriously throughout the Marshall Islands, and Arno Wall benefits from marine protection that keeps fish stocks high and coral coverage dense. Divers who plan their visit around the calm season will find the most predictable conditions, though the site can be enjoyed throughout the year. Arno Wall deserves a place on any serious Pacific diving itinerary, offering a genuine taste of the untouched beauty that makes Marshall Islands diving so highly regarded internationally. Regular visitors note that the marine life here, including gorgonian sea fans, humphead wrasse, green turtle, bigeye trevally, soft coral gardens, grey reef shark, makes every descent memorable.

Dive Briefing

"The dive at Arno Wall begins with a controlled entry and a short transfer from the nearest base, with the guide giving a full briefing on the site layout, expected marine life and emergency procedures. Descending toward a steep drop-off clad in huge gorgonians and sea fans, stepping down into the blue, divers are immediately surrounded by gorgonian sea fans, humphead wrasse, green turtle, bigeye trevally, with the reef revealing more detail the closer you look. The maximum depth reaches about 45 metres, while the average depth sits near 30 metres, so gas planning and a dive computer keep the profile safe and comfortable. Currents are described as moderate, and the guide chooses the entry time to make the most of slack or mild flow, using a reef hook or DSMB when needed. The topography offers natural swim-throughs and ledges that shelter larger animals, and the open water above the reef often holds cruising pelagics. Throughout the dive, neutral buoyancy protects the fragile coral, and the group stays close to the guide to manage depth and any surge. The safety stop is completed in open water on a DSMB, and the boat follows the bubbles to collect divers at the exit point for a relaxed return to base. A calm morning on the outer wall gives the clearest water and the best chance of Napoleon wrasse"