Fish
Black jewfish (spotted croaker)
Corvina negra (black jewfish)
Protonibea diacanthus
At a glance
15–40 lb.
15–330 ft.
Dawn and dusk, and at night.
9 areas
Know it
Spot it, size it up and learn its habits.
- Identification
A big, dark croaker: gray-bronze to almost black with a large head, a big mouth, a pointed to rounded tail and, in young fish, dark spots on the back and fins. Has a large swim bladder that makes drumming sounds.
- Typical size
15–40 lb.
- Maximum size
About 5 ft and over 80 lb.
- Diet
Fish, prawns, crabs and squid.
- Behavior
Gathers in big groups on coastal wrecks, rock bars and channels, especially around the neap tides; very easy to overfish when schooled up. Its swim bladder is worth a lot in Asia, which has led to heavy fishing.
Find it
Where, when and how deep to look.
- Where to find it
Found from Northern Territory & Western Australia, Queensland & the Great Barrier Reef, Southeast Asia (Thailand, Malaysia, Vietnam), Indonesia (Bali, Komodo, Raja Ampat, Sulawesi), Philippines, China, Hong Kong & Taiwan, Japan & South Korea, India, Sri Lanka, Maldives & Pakistan and South Pacific Islands & Papua New Guinea. Coastal wrecks, reefs, deep channels and estuary mouths from the Persian Gulf and India to China, Southeast Asia, New Guinea and northern Australia (Darwin Harbour is famous).
- Habitat
Coastal wrecks, reefs, deep channels and estuary mouths from the Persian Gulf and India to China, Southeast Asia, New Guinea and northern Australia (Darwin Harbour is famous).
- Depth
15–330 ft.
- Fishing depth
20–100 ft.
- Best season
All year; dry season in northern Australia.
- Best time
Dawn and dusk, and at night.
- Best tides
The neap (small) tides and slack water.
- Best weather / conditions
Warm, stable weather; the build-up before the wet season and calm, overcast days are excellent. Heavy rain muddies the water.
Bait & gear
What to tie on and what to throw.
- Best bait
Live mullet, squid, whole fish and big prawns.
- Best artificial lures
Big soft plastics, vibes and slow jigs.
- Tackle setup
Heavy overhead or jigging rod (15–24 kg).
- Hook size
6/0–9/0 circle hooks.
- Line
50–80 lb braid.
- Leader
80–100 lb monofilament.
BigJoe's setup for Black jewfish (spotted croaker)
The rod, reel, line and lures BigJoe would use.
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Catch it
Step by step, from first cast to landing.
Step-by-step: how to catch it
- Go where it lives: Coastal wrecks, reefs, deep channels and estuary mouths from the Persian Gulf and India to China, Southeast Asia, New Guinea and northern Australia (Darwin Harbour is famous).
- Rig up: Heavy overhead or jigging rod (15–24 kg). 80–100 lb monofilament.
- Pick your bait: Live mullet, squid, whole fish and big prawns. Lures: Big soft plastics, vibes and slow jigs.
- Fish it: Fish big baits or plastics on the bottom around wrecks and rock bars at slack water on small tides.
- Time it: Dawn and dusk, and at night. The neap (small) tides and slack water.
- Fishing techniques
Fish big baits or plastics on the bottom around wrecks and rock bars at slack water on small tides.
- BigJoe's tip
When you find a school, take your limit and move on — releasing fish from deep water rarely works for jewfish.
- Catch and release
Catch and release: wet your hands, keep the fish in the water when you can, and release it quickly. Use circle hooks and a dehooker.
Clean & cook
Is it good to eat, and how to prepare it.
- Edibility
Excellent eating — one of the best-tasting fish in its range.
- Cleaning
Bleed and ice it right away. Fillet, then remove the skin and any dark bloodline.
- Cooking suggestions
Excellent, firm white meat; great grilled, fried or in curries.
Stay safe & legal
Safety, rules and taking care of the fishery.
- Safety warnings
Sharp spines and gill covers; crocodiles in northern estuaries.
- Regulations
The NT allows only a small number per person (and per boat) and has spawning protections; Queensland and WA have their own limits. Fish caught deep suffer barotrauma, so stop once you have your limit. Check current rules. Licenses and rules differ by country across the Indo-Pacific: Australia's states, Asian countries and the Pacific islands all set their own bag limits, size limits and marine park zones. Check the local rules or fish with a licensed charter.
- Conservation
Listed as near threatened (IUCN). Take only what you need.
Where it's found
Tap an area to open its fishing map.