Moreton Bay Bugs
Moreton Bay Bugs are one of Queensland’s most prized wild-caught seafood species, known for their sweet, delicate flavour and tender texture. Often considered a premium slipper lobster, they are a favourite for barbecuing, grilling and simple preparations that let their natural sweetness shine.
Moreton Bay Bugs are not a single species, but refer to two closely related species commonly landed in Queensland waters. They are harvested as part of managed commercial fisheries and are a standout example of high-quality Australian wild-caught seafood.
Quick Facts
Common name: Moreton Bay Bugs (slipper lobster / bay bug)
Key species:
Reef/Sand Bug (Thenus australiensis)
Mud Bug (Thenus parindicus)
Depth range: Shallow coastal waters to deeper offshore areas
How they’re caught (Qld): Retained under permitted commercial fishing operations in the East Coast Otter Trawl Fishery (ECOTF)
Stock status (Australia): Sustainable. Managed under state fisheries arrangements
Eating Quality
Flavour
Sweet, delicate and clean
Oiliness
Low
Moisture
Moist
Common Size
Typically larger and thicker-bodied than Balmain Bugs, with individuals commonly ranging from 350–600 g, depending on species and region
Texture
Tender and slightly softer than Balmain Bugs
Flesh Colour
White and opaque when cooked
Buying Tips
Look for clean shells and fresh smell
Key Difference
Eyes sit out on the sides of the head, rather than centrally like Balmain Bugs.
Nutrition Facts
Per 100g Raw Product
Energy: ~85-95 calories
Protein: ~18-20 g
Total fat: ~1.0-1.5 g
Omega-3 (EPA): ~90-120 mg
Omega-3 (DHA): ~110-150 mg
Omega-6 (AA): ~30-45 mg
All values are approximate and can vary by origin.
Cooking Tips
boil | split & grill | Stir through pasta or risotto | Bug rolls and salads | barbeque
Serve chilled with Seafood Sauce
For cooked bugs, keep refrigerated, consume promptly, and avoid repeated temperature changes.
Because of their softer texture, Moreton Bay Bugs should be cooked gently and briefly. Best suited to quick cooking methods that
highlight their natural sweetness without overcooking.
Seasonality
Moreton Bay Bugs are generally available across much of the year, with supply influenced more by weather, fishing effort and trawl access than by a single statewide “bug season”. As a wild-caught product, availability can vary week-to-week depending on sea conditions and when vessels are safely able to work their grounds.
In Queensland, the permitted bugging period generally runs from 1st March to 15th December in the Northern & Central Regions, and
1 November to 20th September in the Southern Regions.
For consumers, the simplest rule is: bugs may be listed year-round, but consistent supply is often strongest when weather is settled and trawl access is open, and lighter when conditions or regional closures reduce fishing activity.
Habitat
Moreton Bay Bugs live on soft sand and mud seabeds, often near reef systems, coastal slopes and open seafloor habitats. Their flattened body shape allows them to move easily across the seabed, where they shelter during the day and feed at night.
Juvenile bugs tend to occupy shallower coastal environments before moving into deeper waters as they mature. These habitats are influenced by water temperature, currents and seabed condition, all of which play a role in the availability of bugs across different regions.
Healthy seabed ecosystems are important for sustaining bug populations and supporting their life cycle. These environments support their feeding behaviour and life cycle.
How They’re Caught
In Queensland, Moreton Bay Bugs are harvested by licensed commercial fishing operations within the East Coast Otter Traw Fishery and retained under permitted arrangements within managed fisheries.
Fishing activity is regulated through gear controls, effort limits and seasonal closure arrangements designed to support sustainable harvest and protect long-term stock health.
Important Features
Moreton Bay Bugs are a different species group to Balmain Bugs, comprising reef bugs and mud bugs (Thenus australiensis and Thenus parindicus). They can be identified by their eyes positioned on the sides of the head and a more streamlined body shape — an easy visual cue for consumers.
About 600 tonnes of Moreton Bay Bugs are reported annually across Australia, with around 90% coming from Queensland fisheries. Historical catch data show annual catches in Queensland have commonly fallen within the 400–700 t range in recent years, reflecting both byproduct retention and, increasingly, directed effort as market demand has grown.
Moreton Bay Bugs have a relatively slow growth rate compared with prawns, taking several years to reach larger market sizes. This slower growth is one reason they are managed carefully within trawl fisheries and why availability can vary depending on environmental conditions and fishing effort.
Did you know?
Moreton Bay Bugs are often confused with Balmain Bugs, but they are different species groups with distinct body shapes, flavour profiles and cooking strengths. Knowing which bug you’re buying helps you choose the right one for your dish. They’re both called “bugs” and both are slipper lobsters – but they are different species groups, look different, and cook a little differently.
Key Differences (Quick Consumer Checklist)
Learn More ...
Read more about the Moreton Bay Bug Fishery Management by clicking the link below.