Adelaide Metropolitan Waters
| Location | 2 km northwest of Glenelg, Gulf St Vincent |
| Access | Boat dive from West Beach Boat Ramp |
| Depth | 10 metres |
| Difficulty | Easy |
| Activity | Scuba Diving |
| Region | Adelaide & Adelaide Hills |
| Accommodation | Camping, mid-range and premium options — See accommodation options |
| Key Feature | Natural reef gutters, hand-feeding fish, sea pike schools |
Hand-Feeding Fish in Natural Reef Gutters
Two kilometres northwest of Glenelg, in just 10 metres of clear Gulf St Vincent water, a series of naturally formed gutters in the seabed has created one of Adelaide’s most engaging and accessible dive sites. Leather Jacket Alley takes its name from the leatherjackets that inhabit these gutters in numbers, but the site’s real appeal is its diversity and approachability — a wide variety of fish and aquatic flora, including striking sea tulips, populate the reef structures, and the fish here are so accustomed to divers that they can be hand-fed, creating close encounters that make this site a favourite among underwater photographers and diving newcomers alike.
The natural gutters that form the site’s structure were carved into the limestone seabed by centuries of water movement, creating channels and overhangs that provide shelter, shade, and attachment surfaces for the marine organisms that form the base of the local food chain. Unlike the artificial reefs and shipwrecks that characterise many of Adelaide’s dive sites, Leather Jacket Alley is entirely natural — a reminder that the Gulf St Vincent seabed holds its own geological and biological treasures beneath the sandy surface.
The Dive Experience
The gutters create a series of swim-throughs and overhangs that give the dive a sense of exploration and discovery. Marine life populates every surface — sponges and sea tulips cling to the gutter walls, while leatherjackets, old wives, and various wrasse species patrol the channels. The fish are remarkably approachable, and hand-feeding creates moments of direct interaction that few dive sites can offer.
The site’s signature spectacle occurs when great schools of sea pike visit the area, forming seemingly impenetrable walls of fish that surround divers in a shimmering curtain of silver. These events are unpredictable but unforgettable when they occur — a reminder that even familiar dive sites can deliver extraordinary surprises. The shallow 10-metre depth allows extended bottom times, making Leather Jacket Alley ideal for unhurried exploration and photography.
Planning Your Dive
Access is by boat from the West Beach boat ramp. The shallow depth and easy conditions make this an excellent choice for newer divers, and the site pairs well with the nearby Glenelg Tyre Reef, Grange Tyre Reef, and Glenelg Barge for multi-dive outings. Standard open water certification is sufficient. The site is best dived in calm conditions with good visibility. Several Adelaide dive operators include Leather Jacket Alley in their regular boat dive schedules.
Leather Jacket Alley is Adelaide diving at its most approachable and rewarding — a natural reef where the fish come to you, the depth is forgiving, and on a good day, a wall of sea pike can turn a gentle dive into a moment of pure underwater theatre. It is the kind of site that reminds you why you learned to dive in the first place.
Where to Stay
Planning an overnight trip? See our Adelaide Hills Accommodation Guide for the best places to stay near this trail.