Taxonomy
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Anguilliformes
- Family
- Anguillidae
- Genus
- Anguilla
- Species
- australis
Habitat
Shortfin eels inhabit freshwater rivers, streams, lakes, and estuaries, preferring slow-moving waters with muddy or sandy bottoms in southeastern Australia and New Zealand. They are catadromous, spending most of their lives in freshwater but migrating to the ocean for spawning. These eels can tolerate a range of salinities, from fully freshwater to brackish coastal areas.
Diet
Juvenile shortfin eels primarily eat insects, crustaceans, and small aquatic invertebrates, while adults consume fish, frogs, and worms. They are nocturnal hunters, foraging at night in riverbeds and hiding during the day. Feeding behavior involves ambushing prey or scavenging in murky waters.
Behavior
Shortfin eels are primarily nocturnal and solitary, spending daylight hours hidden in burrows, under rocks, or in mud to avoid predators. They exhibit territorial behavior in freshwater habitats but undertake long migratory journeys to the sea for spawning. These eels can climb damp surfaces like dams using their muscular bodies, and they are known for their elusive and adaptable nature in various environments.
Fishing
Target Shortfin eels, a popular sport and food fish in regions like southeastern Australia and New Zealand, using effective bottom fishing or trotline techniques with live bait such as worms, small fish, or shrimp to mimic their nocturnal diet of insects and crustaceans; opt for medium-heavy spinning rods paired with reels spooled in 20-30 lb test line and strong hooks to handle their slippery, powerful fights in weedy or muddy environments. The prime season runs from late summer through autumn when they are more active and migratory, with nighttime being the best time of day for bites in slow-moving freshwater rivers, streams, lakes, and estuaries with sandy or muddy bottoms—focus on areas with cover like undercut banks or submerged logs for higher success. Record sizes include IGFA-recognized lengths up to 110 cm and weights around 16 lbs 8 oz, showcasing the thrill of landing these elusive fighters. Conservation-wise, as a Near Threatened species, angler-supported programs through license fees fund habitat restoration and migration pathway improvements, with regulations like slot limits and catch-and-release in certain areas serving as proven tools to sustain populations and ensure long-term waterway health.
Conservation Status
Listed as Near Threatened by IUCN.