Jahir

Jahir is a highly regarded muck dive site in the northern reaches of the Lembeh Strait, North Sulawesi, Indonesia. The site was named after a local dive guide who first discovered and explored it — one of several Lembeh sites bearing the name of the guide responsible for its discovery. The site descends to 28–30 metres of black volcanic sand with coral blocks and rubble patches, and is known for a wide range of muck critters including octopus, cuttlefish, frogfish, and ghost pipefish. Rhinopias scorpionfish have been reported here, though the most consistent rhinopias site in the strait depends on current resident animals.

Overview

Jahir runs along a sloping black volcanic sand bottom with scattered coral blocks, rubble, and low sponge growth extending to approximately 28 metres (sources report depths to 30 metres; the site may continue deeper). The site is slightly deeper than many of the beginner-accessible TK sites, which contributes to the intermediate difficulty rating and the need for careful depth and air management. Visibility averages 8–15 metres. Currents are typically light, though the northern strait position means conditions can be marginally more variable than the sheltered southern sites. Water temperature holds at 26–28°C year-round.

Site Information

• Location: Lembeh Strait, North Sulawesi, Indonesia (Bitung side, northern strait)
• Entry Type: Boat dive
• Site Type: Muck dive
• Difficulty Level: Intermediate
• Maximum Depth: 28 meters
• Typical Visibility: 8–15 metres (25–50 feet)
• Current: Light; occasionally moderate
• Best Time: Year-round; October to May for calmest conditions

Marine Life

Sources confirm at Jahir: octopus (including mimic octopus), cuttlefish, hairy frogfish, flamboyant cuttlefish, ornate ghost pipefish, moray eels, stargazers buried in the sand, purple heart urchins with zebra crabs. Rhinopias scorpionfish — the weedy and hairy species that appear almost alien against rubble and sponge — have been reported at the base of the slope; however, their presence is not guaranteed on every dive and depends on current residents tracked by guides. Ambon scorpionfish and devil scorpionfish are also found in rubble zones. No species are attributed beyond confirmed reports. The site is noted as “great for nocturnal exploration,” suggesting productive night dives as well.

Dive Profile

Head to the deeper end of the site first — around 22–28 metres — where coral blocks and rubble patches hold camouflaged species including scorpionfish. Spend time here before ascending gradually through the mid-slope zone between 15 and 22 metres, where frogfish and ghost pipefish are most active. Work back up to the shallower sections for the safety stop, exploring the upper slope where nudibranchs and smaller critters concentrate. The depth profile rewards solid dive planning: descend deep first, ascend slowly.

Entry and Exit

Access by banca boat. Back roll or giant stride entry. Follow your guide closely — the site’s key camouflaged species are essentially impossible to locate without an experienced spotter. Surface with SMB deployed.

Tips and Recommendations

• Brief your guide explicitly on rhinopias and ambon scorpionfish as target species before descending; ask whether rhinopias are currently resident before the dive
• Spend time with any rhinopias found — they are docile, allow close approach, and reward patient photography
• The deeper profile here demands careful air and no-decompression limit management; plan to begin ascending with sufficient reserve
• Stargazers buried in the sand can deliver electric shocks — do not kneel directly on the bottom
• Night dives at Jahir are offered by some operators; bobtail squid and nocturnal octopus become active after dark

Safety Considerations

Jahir’s depth pushes to 28 metres or beyond, placing it at the more demanding end of intermediate recreational diving. Monitor your no-decompression limits and air supply carefully. Do not approach or touch any scorpionfish — their dorsal spines are venomous. Standard Lembeh precautions apply: no touching sand or rubble, careful buoyancy, SMB carried at all times. Blue-ringed octopus are present throughout the strait.

Photography

Jahir is a strong scorpionfish photography site when rhinopias are resident. Rhinopias — their elaborate skin texture and bold colour variants — are exceptional portrait subjects with a 100mm macro lens at close range. Ambon scorpionfish require supermacro technique due to their small size and intricate surface structure. Mimic octopus hunting in the open can be shot at a slightly wider focal length to capture hunting posture in context. For the deepest zones, monitor air supply carefully — scorpionfish photography is time-consuming, and the depth limits bottom time.

Sources: Dive-the-World – Lembeh Diving, Lembeh Resort – North Sulawesi Diving, Solitude World – Top Muck Sites Lembeh, Infinite Blue Dive Travel – 15 Best Lembeh Sites, Starfish – Lembeh Dive Sites. Last updated 2026-06-14.