Manta Alley
8.7400°S 119.4000°E · drift
Manta Alley is a rocky channel at the far southern tip of Komodo Island where reef manta rays aggregate at cleaning stations, with multiple mantas common on a single dive during peak season. Strong currents and cold thermoclines make this a challenging but rewarding dive.
Overview
The site consists of shallow rocky sections and a small channel cut through rock where mantas feed and use cleaning stations. The shallower areas host cleaning stations at 5–15 metres; sandy channels descend to around 20–25 metres, with a maximum depth of 40 metres. Water temperature is notably cooler here than at northern Komodo sites, typically 22–23°C, which can make for cold dives.
Peak season note: Sources conflict. Dragon Dive Komodo lists November to June as the best period for southern Komodo including Manta Alley. DiveHappy does not specify a single peak window but notes that cold, plankton-rich conditions that attract mantas are driven by southern ocean currents. Mantas can be seen year-round at this site, though sightings are less reliable during the hottest months. Planning a visit between October and March covers the period most consistently mentioned across sources.
Site Information
- Location: Southern tip of Komodo Island, Komodo National Park, East Nusa Tenggara, Indonesia
- Entry Type: Boat dive
- Site Type: Drift dive
- Difficulty Level: Advanced
- Maximum Depth: 40 meters
- Typical Depth: 5–25 meters (mantas concentrate at shallower cleaning stations)
- Water Temperature: 22–23°C (cooler than northern Komodo sites)
- Current: Strong; variable direction
Marine Life
Reef manta rays at cleaning stations are the sole confirmed primary attraction. DiveHappy documented seven mantas on one dive, including a black manta individual. Multiple mantas simultaneously at the channel cleaning stations at 22 metres and in shallower water are confirmed. The cooler, nutrient-rich water supports invertebrate communities typical of southern Komodo. No site-specific confirmation of other pelagic species (trevally, sweetlips, mobula rays) at this exact channel location — these are plausible regional species but not documented specifically at Manta Alley in available sources.
Sources: DiveHappy – Manta Alley Komodo, Dragon Dive Komodo – Manta Rays Komodo, SSI MyDiveGuide – Manta Alley. Last updated 2026-06-10.
Sea-surface temperature and wave height from Open-Meteo Marine (ERA5 reanalysis, monthly averages).
22 verified species observations (17 species) logged within ~11 km of this site between 1995 and 2017, from the Ocean Biodiversity Information System.
- Helcogramma randalli
- Chelonia mydas · Green turtle
- Pomacentrus komodoensis
- Norfolkia brachylepis · Scaly-head Threefin
- Neosynchiropus ocellatus · Marble Dragonet
- Helcogramma striata · Neon Threefin
- Ceratobregma helenae · Helen's Triplefin
- Trimma macrophthalmum · Flame Goby
- Enneapterygius hemimelas · Half-black Triplefin
- Cymbacephalus
- Apogon semiornatus · Half-band Cardinalfish
- Pyrosoma
Scientific survey records skew toward sampled taxa (molluscs, corals) and do not reflect what you are guaranteed to see on a dive.
Source: OBIS (obis.org), aggregated Darwin Core occurrence records.
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