Off Gili Air

Hans Reef

The macro treasure hunt of the Gilis — a frogfish on almost every pinnacle, day or night.

1222METRES

Not really a reef

Hans Reef is not a reef in the usual sense. It is a sand plain off Gili Air with small pinnacles and Biorock structures scattered across it, and the fish concentrate on those structures because there is nothing else to concentrate on.

That is exactly what makes it prime macro diving. Divers who slow down and search the pinnacles find a frogfish on almost every one of them, along with ghost pipefish, harlequin shrimp and nudibranchs. Seahorses hold on to the growth in the shallower sand, garden eels stand up in the open, and small turtles cruise through.

It is a dive that rewards a guide who remembers where things were yesterday, and a diver willing to spend ten minutes on one square metre of sand.

Open Water

What you come for

  • A frogfish on almost every small pinnacle
  • Seahorses on the shallow sand
  • Turtles
  • Great night dive
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Location
Off Gili Air
Depth
12–22 m
Levels
Open Water
Profile
Sand bottom, pinnacles and Biorock structures
Night dive
Yes — a known night-dive spot

Marine life

On most dives

  • A frogfish on almost every pinnacle
  • Seahorses on the shallow sand
  • Ghost pipefish
  • Harlequin shrimp
  • Garden eels
  • Nudibranchs
  • Turtles
  • Mandarinfish at dusk

After dark, and at dusk

Hans Reef is as good after dark as it is in daylight, which is not true of every site. The sand comes alive at night and a torch beam turns the pinnacles into something else entirely.

Dusk is its own dive here: mandarinfish come out in the last light of the day, and the window for seeing them is short enough that the timing of the entry matters more than anything else on the dive.

Conditions across the Gilis

The same for every site on this list.

Water temperature
27–30 °C year-round — a 3 mm wetsuit is plenty
Visibility
10–35 m — clearest in the dry season, May to October
Boat ride
5–15 minutes from Gili Air
Group size
Maximum 4 divers per guide

Diving works all year here. April to October is the dry season and gives the clearest water, with September, October, May and June the sweet spot; July and August are the busiest. November to March brings plankton and less visibility, and with it a better chance of something big passing through.

Dive it with us

Small groups, four divers to a guide, and a crew that picks the site by the conditions rather than the timetable. Message us on WhatsApp and we will tell you what the water is doing today.

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More dive sites

Every site on this page is dived from Gili Air, most of them within a fifteen-minute boat ride.

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