Leatherjacket
Scientific name: Family Monacanthidae
Common names: Leatherjacket, Fan-bellied Leatherjacket, Horseshoe Leatherjacket, Six-spined Leatherjacket, Ocean Leatherjacket
Average size: 20–40 cm
Trophy size: 45 cm+
Activity pattern: Reef-associated grazer and opportunistic feeder, active throughout daylight hours
Distribution and key locations (Australia)
Leatherjackets are one of Australia’s most widespread and commonly encountered inshore reef species. Found throughout temperate and subtropical waters, they are often considered a nuisance by anglers targeting snapper and other reef fish due to their ability to strip bait quickly. However, larger leatherjackets are excellent table fish and can provide surprisingly enjoyable light-tackle fishing.
Leatherjackets are particularly abundant in southern Australia, where they inhabit shallow reefs, kelp beds, jetties, and offshore structure.
Prime regions
- New South Wales
- Victoria
- Tasmania
- South Australia
- Southern Western Australia
High-percentage areas
- Kelp-covered reefs
- Rocky headlands
- Harbour structures
- Breakwalls
- Artificial reefs
- Offshore reef systems
Leatherjackets rarely stray far from structure and often congregate in large schools.
Habitat features to look for
Leatherjackets are highly structure-oriented and spend much of their lives around reef systems rich in marine growth.
Key structure
- Kelp beds
- Rocky reefs
- Jetty pylons
- Breakwalls
- Mussel-encrusted structure
- Artificial reefs
Food sources
- Small crustaceans
- Marine worms
- Molluscs
- Tunicates
- Sea squirts
- Algae and marine growth
Water conditions
- Clean coastal water
- Moderate current
- Areas with abundant reef life
Productive leatherjacket habitat usually combines hard structure, kelp growth, and a healthy population of marine invertebrates.
Seasonal patterns
Leatherjackets are available year-round throughout much of their range.
Best seasons
- Autumn
- Winter
- Spring
Seasonal notes
- Larger schools often form during cooler months
- Winter can produce exceptional catches in southern states
- Stable conditions generally improve fishing consistency
Leatherjackets often become more concentrated over reef systems as water temperatures fall.
Weather and conditions (Critical)
Ideal conditions
- Light winds
- Moderate tidal movement
- Clean water
- Light swell
Best fishing conditions
- Fishing directly over reef structure
- Stable weather patterns
- Moderate current flow
Avoid
- Heavy swell
- Extremely dirty water
- Excessive drift speed
Leatherjackets feed actively under a wide range of conditions compared with many other reef species.
Bait – what actually works
Because of their small mouths and powerful teeth, leatherjackets respond best to compact bait presentations.
Top natural baits
- Squid strips
- Prawn pieces
- Pipi meat
- Mussels
- Pilchard cubes
- Cuttlefish strips
- Fish flesh strips
Bait rules
- Use small baits
- Present baits close to structure
- Expect frequent bait theft from larger schools
Fresh bait consistently outperforms frozen alternatives.
Tackle and rigs
Leatherjackets are not large fish, but their sharp teeth require some consideration when selecting terminal tackle.
Rod and reel
- Rod: 1–4 kg light spin rod
- Reel: 1000–2500 size spin reel
- Line: 4–10 lb braid
- Leader: 8–15 lb fluorocarbon
Terminal gear
- Long-shank hooks
- Small baitholder hooks
- Light paternoster rigs
- Small sinkers
Common rigs
- Two-hook paternoster
- Running sinker rig
- Dropper rig
Long-shank hooks make unhooking fish significantly easier.
Lures (when and why)
Although not commonly targeted with lures, leatherjackets can readily take artificials.
Effective lures
- Small soft plastics
- Tiny metal jigs
- Micro-blades
- Gulp-style grub plastics
When to use lures
- Fishing reef edges
- Light-tackle sportfishing
- Schools visible around structure
Retrieval style
- Slow hops
- Gentle lifts
- Minimal movement
Leatherjackets frequently inspect and peck at lures before committing.
Boat vs land-based fishing
Boat fishing
Advantages:
- Access to offshore reef systems
- Ability to anchor over productive structure
- Greater variety of habitats
Land-based fishing
Excellent around:
- Jetties
- Breakwalls
- Rock platforms
- Harbour structures
Many anglers catch their first leatherjackets from public jetties and coastal rock walls.
Time of day
- Best: Morning and afternoon
- Daytime: Consistently productive
- Night: Less reliable
Unlike many predatory species, leatherjackets are primarily visual feeders and often bite best during daylight hours.
Common mistakes
- Using oversized hooks
- Fishing too far above structure
- Presenting large baits
- Using heavy tackle unnecessarily
- Ignoring schools visible around jetties and reefs
- Striking too aggressively
Leatherjackets often nibble repeatedly before taking a bait fully.
Final rule of leatherjacket fishing
Fish close to reef structure, use small fresh baits, and scale down your tackle.
Successful leatherjacket anglers focus on productive reef systems, present compact baits naturally, and embrace finesse fishing. While often overlooked, larger leatherjackets provide excellent eating and can offer fast-paced action on light tackle throughout Australia’s southern coastal waters.
