Freshwater Longtom

Strongylura krefftii
Freshwater Longtom - Marinewise © 2025 MarineWise

Quick Facts

Scientific name Strongylura krefftii
Other names Fitzroy Garpike, Long Tom
Size Up to 100 cm (3.3 ft)
Weight Under 2 kg (4.4 lb)

Distribution

Habitat & AU Distribution Fresh, brackish & marine waters in rivers, wetlands, creeks, lagoons & tidal coastal areas often near structure & vegetation
Depth Range 0 - 5 m (16 ft)
Freshwater Longtom Distribution

Interesting Info

  • The Freshwater longtom is found in coastal rivers, creeks, and lagoons of northern Australia, from Queensland across the Northern Territory to northern Western Australia. The species also occurs in New Guinea.
  • Its body is silvery-grey with a greenish back, and it has an extremely long, beak-like jaw lined with sharp teeth — perfectly designed for grabbing fast-moving prey.
  • Unlike many other needlefishes, which are strictly marine, this species thrives in freshwater habitats, often far inland, though it can tolerate brackish water as well.
  • Freshwater Longtoms are powerful predators, feeding mainly on smaller fish and crustaceans, which they chase down with bursts of speed.
  • They often hunt near the surface, where their streamlined bodies and long jaws help them strike with precision.
  • Their camouflage — silvery sides and darker backs — makes them hard to see from above or below.
  • Breeding occurs in the wet season, when adults spawn in rivers and floodplain lagoons. Females release eggs with sticky filaments that attach to vegetation until hatching.
  • Juveniles grow quickly in floodplain wetlands before moving back into rivers.
  • The lifespan is not well studied but is thought to be 6–10 years, based on growth studies of related species.
Species Interaction

Recreational Fishing, Conservation

The Freshwater Longtom is sometimes caught by recreational anglers in northern Australia, prized for its strong runs and aerial leaps. It is not a major food fish, but it is important ecologically as a top predator. For people, its main interaction is through fishing and river conservation efforts, as it depends on connected, healthy river systems.

Scientific Classification

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Beloniformes

Family: Belonidae

Genus: Strongylura

Species: Strongylura krefftii/span>

Conservation Status

The Freshwater Longtom is listed as a Vulnerable species on the IUCN Red List of Threatened Species. The Australian government has listed it as a vulnerable species due to its declining population.

How to catch
Freshwater Longtom

Catch Difficulty: Intermediate

Tackle: Running Sinker Rig, Artificial Rig

Bait: Lures, Pilchards, Prawns, Worms, Yabbies, Soft plastics, Live minnow, Insects

Technique: Keep bait close to structure, Cast lures close to structure

Popularity: Targeted