Haian Maru - Chuuk (Truk) Lagoon
The Haian Maru feels like stepping into a ghost story. We love this wreck because it’s surprisingly intact, sitting upright, and so accessible. You can slip into the holds and find heaps of sake bottles, still in their wooden crates, a real eerie glimpse into the past. Down in the engine room, shafts of light pierce through, illuminating schools of glassfish that shimmer around the machinery. Our favourite part has to be the stern, where the prop is still in place and big schools of unicornfish often mill about. We’d suggest going early in the morning, before other boats stir up the sediment, for the best visibility inside. It’s a site that really makes you slow down, absorbing the history and the way the reef has completely reclaimed the ship. You’ll find plenty of black sea cucumbers draped across the decks, and we’ve seen some huge parrotfish grazing on the coral growth.
- Location
- Chuuk (Truk) Lagoon, Micronesia, Central & South Pacific
- Coordinates
- 7.382708, 151.855680
- Type
- wreck
Best Time to Dive in Chuuk (Truk) Lagoon
The warmest water temperatures in Chuuk (Truk) Lagoon occur in January, averaging 28.9°C. The coolest conditions are in December at 28.9°C.
Monthly Water Temperatures
- January: 28.9°C (air: 27.8°C)
- February: 28.9°C (air: 27.7°C)
- March: 28.9°C (air: 27.5°C)
- April: 28.9°C (air: 27.5°C)
- May: 28.9°C (air: 27.7°C)
- June: 28.9°C (air: 27.5°C)
- July: 28.9°C (air: 27.5°C)
- August: 28.9°C (air: 27.7°C)
- September: 28.9°C (air: 27.7°C)
- October: 28.9°C (air: 27.9°C)
- November: 28.9°C (air: 27.9°C)
- December: 28.9°C (air: 27.9°C)
Nearby Dive Sites in Chuuk (Truk) Lagoon
- AIKOKU MARU - 55m (wreck)
- AMAGISAN MARU - 45m (wreck)
- Betty Bomber (wreck)
- Chuuk Diving: The Wrecks of Truk Lagoon (wreck)
- Chuuk Lagoon Barrier Reefs Awash (reef)
- DAI NI HINO MARU - 36m (wreck)
- Emily Flying Boat - 12-15m (wreck)
- Emily Flying Boat (wreck)
- Fujikawa Maru (wreck)
- Fujikawa Maru (wreck)
- Fujikawa Maru - 10-35m (wreck)
- FUJIKAWA MARU - 33m (wreck)
- FUJISAN MARU - 40m (wreck)
- Fumitsuki Maru (wreck)
- FUMITSUKI (POSSIBLY) - 2m (wreck)
Nearest Dive Centres to Haian Maru
- Odyssey Adventures - ["PADI"]
- Truk Stop
- Vision Wealth FSM
Marine Life in Chuuk (Truk) Lagoon
Home to 213 recorded species including 133 reef fish, 36 hard corals, 17 sea cucumbers, 12 sea snails & nudibranchs, 5 sharks & rays, 4 clams & mussels.
Notable Species
- Bristle-toothed Surgeonfish (Ctenochaetus striatus) - Reef Fish
- Bleeker's Parrotfish (Chlorurus bleekeri) - Reef Fish
- Bullethead Parrotfish (Chlorurus sordidus) - Reef Fish
- Long-nosed Parrotfish (Hipposcarus longiceps) - Reef Fish
- Blunt-head Parrotfish (Chlorurus microrhinos) - Reef Fish
- Small giant clam (Tridacna maxima) - Clams & Mussels
- Saddled Parrotfish (Scarus dimidiatus) - Reef Fish
- Clown Tang (Naso lituratus) - Reef Fish
- Black sea cucumber (Holothuria atra) - Sea Cucumbers
- Greenfish (Stichopus chloronotus) - Sea Cucumbers
- Schlegel's Parrotfish (Scarus schlegeli) - Reef Fish
- Roundhead Parrotfish (Scarus globiceps) - Reef Fish
- Dusky Parrotfish (Scarus niger) - Reef Fish
- Blackspotted Sea Cucumber (Pearsonothuria graeffei) - Sea Cucumbers
- Batavian Parrotfish (Scarus psittacus) - Reef Fish
- Crown of thorns starfish (Acanthaster planci) - Starfish
- Sea chub (Kyphosus cinerascens) - Reef Fish
- Foxface (Siganus vulpinus) - Reef Fish
- Banded maori wrasse (Cheilinus fasciatus) - Reef Fish
- Unicornfish (Naso annulatus) - Reef Fish
Recommended Packing List for Haian Maru
Based on average water temperature of 28.9°C.
- Shorty or Rashguard - warm 29°C water needs minimal exposure protection
- Mask - essential for every dive
- Fins
- BCD - buoyancy compensator
- Regulator - your most safety-critical piece of gear
- Dive Computer - tracks depth, time, and NDL
- Surface Marker Buoy (SMB) - essential for boat pickups
- Dive Torch - useful for crevices and colour at depth
- Underwater Camera - capture your diving memories