Exact-site Hugo's Trench summary, species list, and 15-18 m depth.
Australia · Byron Bay and Nguthungulli Julian Rocks
Protected trench dive mixing macro walls with bigger passing animals.
Protected trench dive mixing macro walls with bigger passing animals.
Julian Rocks - Hugos Trench is a trench-and-wall dive cut into the rock on the more protected side of Nguthungulli / Julian Rocks, where narrow passages, shadowed crevices, and sheer walls concentrate both macro life and larger visiting animals. The site is loved for close-up hunting along the rock faces, with nudibranchs, shrimp, eels, and other small critters hiding in the structure while rays, turtles, wobbegongs, and seasonal sharks pass through the same terrain. It feels more intricate than exposed, making it a strong choice when divers want Julian Rocks biodiversity without committing to the more open big-animal stations.
Site Conditions
Safety Notes
This is an offshore guided boat dive with narrow trench features, so divers should follow the briefing closely, maintain buoyancy around the walls, and avoid treating the site like an overhead swim-through unless conditions are clearly suitable.
Access Restrictions
Access is by boat only through local Julian Rocks operators launching from Byron Bay.
Legal Notes
The site lies within the protected Julian Rocks Nguthungulli reserve and Cape Byron Marine Park, where collecting or destroying animals is prohibited and spearfishing is not allowed.
Community notes to help plan your visit.
Scuba Diving
A macro-oriented scuba dive along a trench with sheer wall structure and a mix of small critters and occasional larger rays and sharks.
Conservative baseline from public research. No community dives logged yet.
Last Updated
Research Sources
Exact-site Hugo's Trench summary, species list, and 15-18 m depth.
Protected status and no-take language for Julian Rocks.
Independent seasonal summary and Hugo's Trench depth band.
Two parallel trenches, shelter from northerlies, 8-17 m depth, and refuge-from-current framing.

Shallow Julian Rocks bommies with current and big-animal action.

Protected shallow Julian Rocks site for beginners and snorkelers.

Advanced Julian Rocks cave site with winter grey nurse sharks.