Scuba Season
Underwater at Admiralty Anchor (Osprey Reef)
Grey reef shark confirmed 7 months ago

Admiralty Anchor (Osprey Reef)

Great Barrier Reef · Australia

A wall site on Osprey Reef's western edge named for a centuries old admiralty pattern anchor wedged inside a narrow cave passage at around 20 m. The coral terrace at 8 to 15 m steps off into a vertical wall that vanishes into more than 1,000 m of indigo Coral Sea water. Nutrient rich currents rise against the structure and pull in grey reef and whitetip sharks, schools of midnight snapper, red tail wrasses, and lyretail hogfish; eagle rays and the occasional dwarf nautilus drift past the deeper edges. Visibility routinely tops 60 m and can exceed 80 m from September to November when the trade winds drop.

Conditions

Depth

8 to 35 m

Advanced depths

Current

Can be moderate

Can pick up on the edge

Visibility

30 to 55 m

Clearest in the calm season

Water

24 to 30°C

5mm wetsuit

Month by month

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Water (°C)282827272625242425262728
Vis (m)252530353530303540404030
CurrentGentleGentleGentleGentleModerateModerateModerateModerateGentleGentleGentleGentle

Your chances of seeing each animal

See all species recorded here →

Gear

  • Basic kit

    • Mask and fins
    • BCD and regulator
    • 3mm full wetsuit · warm water
    • Dive computer