Harto's Reef is a marine reef site located off Arborek Island in Raja Ampat, Indonesia. This site is suitable for intermediate divers and requires boat access. The reef structure reaches depths of 30 metres, offering a consistent profile for exploration. Divers can expect visibility ranging from 20 to 30 metres. Conditions are characterised by mild currents, which help maintain water movement across the reef. Water temperatures are warm, typically ranging between 28 and 30 degrees Celsius throughout the year. As there are no facilities at the site, divers should arrange equipment, tank fills, and transport with a local dive operator before departure.

Batu Rufus is a reef, wall, and drift dive site located 1000 metres from Arborek Island. The site features depths ranging from 5 to 25 metres, with an average depth of 15 metres. It is suitable for beginners, though boat access is required. Divers experience mild currents, though these can increase without warning, making it advisable to stay near the reef wall for shelter. Visibility typically ranges from 16 to 30 metres, though it can vary. Water temperatures remain between 28 and 30 degrees Celsius throughout the year. Always follow your guide's briefing and maintain proximity to the reef to manage shifting conditions.

Fam Wall is a vertical reef dive located off Arborek Island, Indonesia. The site features a wall that drops from a shallow 5-metre crest to a maximum depth of 25 metres, with an average depth of 18 metres. Access is by boat only, and the site is characterised by strong currents that require active drift management. Visibility typically ranges between 15 and 30 metres. Due to the potential for strong currents and the depth profile, this site is suited for intermediate divers. Divers should coordinate with boat crew to confirm current direction and establish a drift plan before entry.

My Reef is a boat-access reef site located off Arborek Island in Raja Ampat. The site features a depth range of 8 to 30 metres, making it suitable for intermediate divers and snorkellers exploring the shallower sections. Conditions are characterised by mild currents and variable visibility that can reach up to 30 metres. Water temperatures remain warm, ranging between 28 and 30 degrees Celsius throughout the year. Species recorded around this area include Napoleon Wrasse, Emperor Angelfish, Clown Triggerfish, Coral Grouper, Bluegirdled Angelfish, Regal Angelfish, Giant Moray, Titan Triggerfish, Banded Pipefish, Chromodoris Nudibranch, Harlequin Sweetlips, various wrasses, Blackspotted Pufferfish, and Striped Surgeonfish.

The Lagoon at Arborek Island offers a diverse underwater environment combining reef, wall, drift, and cave diving. Suitable for intermediate divers, the site ranges from 5 to 25 metres in depth with an average of 12 metres. Visibility typically fluctuates between 10 and 30 metres. Moderate currents are common, requiring boat access and careful planning with a guide to navigate shifting conditions. The topography includes caverns that reward those experienced in confined spaces. Water temperatures remain warm, between 28 and 30 degrees Celsius. Divers should remain vigilant for jellyfish and sharks, and be prepared for currents that can strengthen rapidly during the dive.

Piaynemo Jetty is a shallow reef site located off Arborek Island in Raja Ampat. The site features a healthy reef structure surrounding an old jetty, providing a sheltered environment for snorkellers. Depths range from the surface to 5 metres, with an average of 3 metres. Conditions are generally mild with visibility between 15 and 30 metres. The site is accessible via a shore entry and is well-suited for beginners. Water temperatures remain consistent throughout the year, ranging between 29 and 30 degrees Celsius. Equipment rental and guided tours are available at this location. Divers and snorkellers should be aware of sharp coral and the presence of sharks in the area.

Seamount is an open-water pinnacle located 2000 metres from Arborek Island. The structure rises to a minimum depth of 8 metres and drops away into deeper water beyond 30 metres. This site is suitable for advanced divers due to strong, unpredictable currents that require careful navigation and active depth monitoring. Divers should use the reef as a buffer and work the upcurrent side of the pinnacle. Access is by boat only, and conditions require briefing the skipper on drift protocols before entry. Visibility can be variable, making it essential to maintain awareness of your position on the structure.

Melissa's Garden, located off Arborek Island, features two pinnacles situated atop a shallow plateau. The site consists of a sloping reef that descends to a sandy bottom at 20 metres, with depths ranging from 5 to 25 metres. Divers and snorkellers can explore the hard and soft coral formations across the plateau and the reef slope. Access to this site requires a boat. Conditions include moderate currents and visibility typically between 10 and 30 metres. The water temperature remains consistent, averaging 29 degrees Celsius throughout the year. This site is suitable for beginners and offers a typical dive duration of 60 minutes.