Epaulette Shark

Epaulette sharks are placid, harmless, and slow-moving, making them wonderful subjects for macro and wide-angle photography. When approaching an individual, maintain neutral buoyancy well above the delicate reef flat or sandy bottom to avoid silting up the area or damaging fragile coral colonies. Move slowly and avoid boxing the shark in against reef walls; give it ample room to walk or swim away if it feels pressured. During night dives, avoid shining high-intensity torch beams directly into its eyes; instead, diffuse your primary light or utilise the soft edge of the beam to observe its natural hunting behaviour. For photographers, a medium focal length or wide-angle lens with dual strobes turned to low power helps capture the distinctive epaulette marking and walking motion without washing out the pale, spotted skin. Never attempt to touch, restrain, or pick up a walking shark.

The best time to encounter epaulette sharks on the Great Barrier Reef runs from June to November, coinciding with the Australian winter and spring when underwater visibility is at its peak and tidal ranges create accessible shallow-water reef walking and night diving opportunities. Liveaboard expeditions departing from Cairns or Townsville visit outer reefs and pristine coral cays during these calmer dry months. In Papua New Guinea, including Milne Bay and the Tufi Fjords, diving is reliable year-round, but the calmest sea conditions occur between September and December and from April to June. Night dives in these regions regularly yield sightings as sharks clamber across shallow bommies. In the Raja Ampat and Cenderawasih Bay regions of West Papua (home to closely related walking shark species of the same genus), dive conditions peak between October and April, with calm waters and phenomenal nocturnal biodiversity.

Epaulette sharks inhabit exceptionally shallow inshore waters across the tropical Southwest Pacific Ocean, primarily throughout the northern Great Barrier Reef, the Torres Strait, and around the southern coasts of Papua New Guinea. They are quintessential shallow-reef specialists, most commonly encountered in water depths ranging from just a few centimetres in intertidal zones down to approximately 10 metres, though they occasionally venture down to 40 metres. Their preferred microhabitats include exposed coral reef flats, shallow lagoons, sandy patches between patch reefs, and intertidal pools within dense branching coral zones. These sharks thrive in turbulent, sunlit environments where tidal flows regularly drain reef crests, leaving complex topographies of exposed limestone and sheltered bommies that the sharks navigate effortlessly.

Epaulette sharks are specialised benthic predators that forage primarily under the cover of darkness. Their diet consists predominantly of small, reef-dwelling invertebrates such as polychaete worms, crabs, snapping shrimp, and small mantis shrimp, supplemented by small benthic teleost fish and occasional shelled molluscs. Equipped with electroreceptive ampullae of Lorenzini and sensitive sensory barbels near their nostrils, they methodically scan the substrate to locate prey buried in sand pockets or hidden deep inside coral crevices. Rather than relying on sharp, tearing teeth, their dentition features small, clutching-and-crushing plates suited for crunching hard chitinous carapaces. They frequently create suction with their muscular buccal cavity, drawing out prey from narrow cracks, or forcefully nose down into loose coral gravel and sediment, churning the substrate as they extract elusive invertebrates.