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Fish

Black jewfish (spotted croaker)

Corvina negra (black jewfish)

Protonibea diacanthus

SaltwaterBrackish

At a glance

Typical size

15–40 lb.

Depth

15–330 ft.

Best time

Dawn and dusk, and at night.

Found in

9 areas

1

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.

2

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.

3

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.

4

Catch it

Step by step, from first cast to landing.

Step-by-step: how to catch it

  1. 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).
  2. Rig up: Heavy overhead or jigging rod (15–24 kg). 80–100 lb monofilament.
  3. Pick your bait: Live mullet, squid, whole fish and big prawns. Lures: Big soft plastics, vibes and slow jigs.
  4. Fish it: Fish big baits or plastics on the bottom around wrecks and rock bars at slack water on small tides.
  5. 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.

5

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.

6

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.

Sources & photo credits

Sources

  1. FishBase — Protonibea diacanthus
  2. IUCN Red List — Protonibea diacanthus
  3. International Game Fish Association (IGFA)
  4. FAO Fisheries and Aquaculture
  5. Photo credits