Freshwater Crayfish Diving in the Victorian Highlands

The Animal

The Murray spiny crayfish (Euastacus armatus) is the largest freshwater crustacean in Australia and one of the largest in the world. It inhabits clear, cold, fast rivers in the Victorian and NSW highlands, typically in water between 10 and 18 degrees, hiding under boulders and in bedrock crevices. It is ancient, slow-growing — a large animal may be 30 years old — and increasingly threatened by warming water temperatures and habitat degradation.

Recreational harvest is legal in Victoria with a fishing licence and a daily bag limit of five. Trapping is not permitted — the legal method is hand-collection by diving. This is not coincidental. It limits harvest to physically capable divers willing to enter cold water and search for individual animals, which is the most sustainable harvest method possible for a long-lived species.

The Dive

You enter a highland river in a wetsuit — 3mm minimum, 5mm if you plan to spend more than 20 minutes in the water. The visibility in these rivers on a clear autumn day is extraordinary: 5-10 metres in the right conditions, looking upstream through turquoise water at boulders the size of small cars.

You find the crayfish by searching under boulders systematically. They will often retreat from light and movement, pressing deeper into crevices. The challenge is reaching in far enough to grip them securely — spiny crayfish have defensive rostral spines that draw blood casually. Heavy gloves are wise.

The Table

Murray spiny crayfish is exceptional eating — richer and sweeter than most marine crayfish, closer in character to European crayfish than to southern rock lobster. Halved and grilled over coals with butter and tarragon, it needs nothing else. For more detailed guidance on [cooking crayfish properly](https://wildrangelife.com/blog/rock-lobster-cooking-methods-australia), these techniques also work brilliantly with freshwater species. Browse our fishing and outdoor accessories.

is diving or hand collection only, making this one of Australia's most challenging and rewarding freshwater pursuits. ## Essential Gear for Highland Crayfish Diving ### Wetsuit Selection In the frigid waters of the Victorian highlands, a quality wetsuit isn't just comfort—it's survival gear. Water temperatures rarely exceed 15°C even in summer, and hypothermia can set in quickly without proper protection. A **5-7mm full wetsuit** is the minimum thickness for extended sessions. Brands like O'Neill, Rip Curl, and Xcel offer excellent options in the $200-$400 range. The [O'Neill Psycho Tech 6/5mm Wetsuit on Amazon](AMAZON_LINK) provides exceptional warmth with flexible neoprene that won't restrict movement when reaching into rocky crevices. For your extremities, invest in **5mm neoprene boots** with aggressive sole patterns for grip on slippery river rocks. **3mm neoprene gloves** are essential—you'll be feeling around boulder undersides and into dark gaps where visibility is zero. The tactile feedback through quality gloves can mean the difference between a successful catch and empty hands. ### Safety Equipment Alpine rivers are unforgiving environments. A **snorkelling mask and snorkel** allows you to spot crayfish hiding spots without repeatedly surfacing. Choose masks with wide fields of vision and low-volume designs that equalise easily during shallow dives. A **bright-coloured dive flag or float** attached to your person helps other water users spot you, though you'll often have these pristine waterways to yourself. Pack an emergency whistle and consider a PLB (Personal Locator Beacon) for remote locations like the Buchan River or upper Murray tributaries. ### Collection Tools While hand collection is the norm, a **long-handled mesh scoop net** helps secure crayfish without losing them in swift current. Look for nets with 30-40cm handles and fine mesh that won't damage the animals. A **mesh collection bag** attached to your weight belt keeps caught crayfish secure while leaving your hands free to continue diving. Small **waterproof LED torches** are invaluable for peering into dark undercuts and caves. The [Olight Warrior Mini 2 Tactical Flashlight on Amazon](AMAZON_LINK) offers exceptional brightness and waterproofing in a compact package that won't drag you down. ## Prime Locations in the Victorian Highlands ### The Ovens River System Flowing from Mount Buffalo through Bright and Myrtleford, the Ovens River offers some of Victoria's most accessible highland crayfish diving. The stretch between Bright and Porepunkah features ideal habitat—clear water flowing over granite bedrock with countless boulder fields. Park at the Bright Riverside Caravan Park and wade upstream. The river averages 1-2 metres depth with excellent visibility most of the year. Target the deeper pools below rapids where crayfish shelter during daylight hours. Early morning and late afternoon sessions yield the best results as crayfish become more active in low light. ### King River The King River near Whitfield provides spectacular scenery and excellent crayfish habitat. The water flows gin-clear over bedrock shelves, creating numerous undercuts perfect for large Murray spiny crayfish. Access is via the Great Alpine Road, with several roadside parking areas. The pools below King River Falls are particularly productive, though the access walk requires reasonable fitness. Expect water temperatures around 10-12°C even in summer, making this location strictly for experienced cold-water divers. ### Buchan River For the ultimate wilderness experience, the Buchan River in East Gippsland offers pristine crayfish habitat with minimal angling pressure. The limestone gorges create extensive cave systems where large crayfish congregate. Access requires 4WD capability and camping gear for multi-day trips. The reward is untouched habitat where 25cm+ crayfish are regularly encountered. Book accommodation at Buchan Caves Reserve or wild camp with appropriate permits. For alpine adventures at similar elevations, the [Bogong High Plains](https://wildrangelife.com/blog/bogong-high-plains-alpine-walk-four-days) offer comparable wilderness experiences. ## Advanced Diving Techniques ### Reading the Water Successful crayfish diving begins before you enter the water. Scan for [reading the water](https://wildrangelife.com/blog/how-to-read-river-water-fishing) techniques that help identify productive habitat—look for deep pools with rocky overhangs, undercut banks where current has carved beneath large boulders, and areas where the riverbed drops suddenly creating shadow zones. ## Essential Gear for Crayfish Diving Water temperatures in highland streams rarely exceed 15°C, even in summer, making proper thermal protection crucial. A quality 5mm wetsuit is the minimum requirement, though many experienced divers prefer 7mm suits for extended sessions. The [Alder Response 5mm Steamer Wetsuit](AMAZON_LINK) ($180-250) offers excellent thermal protection and flexibility for underwater manoeuvring around rocky substrates. Visibility underwater can be challenging, particularly in deeper pools where Murray spiny crayfish prefer to shelter. A reliable dive torch is essential equipment. The [Scubapro Nova 850R Dive Light](AMAZON_LINK) ($120-180) provides excellent beam penetration and features a red light mode that won't spook crayfish as readily as white light. Thick neoprene gloves protect hands from sharp rock edges and defensive crayfish claws. The large specimens can deliver a painful pinch, and their spiny carapace can easily puncture unprotected skin. Look for 5mm gloves with reinforced palms and fingers. ## Prime Locations in Victorian Highlands The upper Murray River around Khancoban and the Mitta Mitta River system consistently produce good numbers of Murray spiny crayfish. These areas feature the ideal combination of rocky substrates, clear water, and appropriate temperatures. The Ovens River between Bright and Mount Buffalo also holds healthy populations, particularly in the deeper pools below major rapids. Access can be challenging, as the best spots often require hiking into remote valleys. The area around Falls Creek and Mount Hotham offers multiple stream options within reasonable walking distance of vehicle access. Early morning diving typically yields the best results, as crayfish are more active in low-light conditions. ## Hunting Techniques and Best Practices Successful crayfish diving requires patience and systematic searching. Focus on large boulders and bedrock shelves where crayfish create burrows and hiding spots. Look for telltale signs: small mounds of excavated gravel, claw marks on rock surfaces, and shed shells during moulting season (typically October to December). Approach potential hiding spots slowly and check underneath overhangs thoroughly. Crayfish often position themselves deep under rock ledges with only their antennae visible. A small dive knife or metal probe helps dislodge reluctant specimens without damaging them. Water levels significantly impact success rates. Recent rainfall can muddy streams and reduce visibility to near zero. Check local weather conditions and avoid diving within 48 hours of significant rainfall. Conversely, extremely low water during drought conditions concentrates crayfish in deeper pools but may stress populations. ## Sustainable Harvesting Principles Victorian regulations limit harvesting to five crayfish daily, but sustainable practice often means taking fewer, particularly larger specimens. Avoid harvesting during spawning season (winter months) when females carry eggs. Release any female with visible eggs immediately, regardless of size. Size matters for population sustainability. Focus on crayfish over 120mm total length while releasing smaller specimens to grow and reproduce. A 120mm Murray spiny crayfish is typically 8-12 years old and has contributed to several breeding cycles. Consider water temperature when deciding whether to harvest. During unseasonably warm periods above 20°C, crayfish populations experience stress. Avoid harvesting during these conditions to minimise additional pressure on already stressed populations. ## Processing and Preparation Fresh crayfish require immediate processing for optimal eating quality. The [Victorinox Swiss Army Fisherman Knife](AMAZON_LINK) ($45-65) excels for fieldwork, featuring a sharp blade and scaling tool perfect for initial processing streamside. Transport live crayfish in a cool, moist environment using damp hessian sacks or purpose-built crayfish bags. Never transport them in water, as this depletes oxygen levels rapidly. Process within 2-3 hours of capture for peak freshness and flavour. The tail contains most edible meat, though large specimens also provide worthwhile claw meat. Remove the digestive tract (dark line running down the tail) before cooking. Simple boiling in salted water for 8-10 minutes preserves the delicate, sweet flavour that makes these ancient crustaceans such a prized catch.