How to Identify Black Jewfish

To identify Black Jewfish (Protonibea diacanthus), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Adults are typically silvery-grey to brownish-grey on the dorsal side, fading to a lighter, silvery-white on the ventral side. The most distinctive feature is the presence of numerous prominent, dark, often irregularly shaped spots scattered over the head, body, and fins. Juveniles are generally lighter with more pronounced spots.

Scale type

ctenoid

Mouth position

subterminal

Distinctive features

Large, prominent dark spots covering the body and fins., A deep, compressed body that tapers towards the tail., A large mouth with a slightly inferior jaw., A prominent lateral line that extends to the caudal fin., Strong, ctenoid scales., Can reach up to 150 cm (59 inches) in length and over 45 kg (100 lbs) in weight, though typically encountered at 60-100 cm.

Dorsal fin

Two dorsal fins; the first is spiny (9-10 spines), and the second is much longer with one spine and 25-28 soft rays. A deep notch separates the two.

Tail fin

Truncate to slightly emarginate caudal fin.

Pectoral fin

Relatively long and pointed pectoral fins.

Distinctive fins

Anal fin with 2 spines and 7 soft rays. Pelvic fins are thoracic.

Identification Tips

1. 1

   Spots

   Look for the characteristic large, dark, irregular spots covering the body and fins. This is the most reliable distinguishing feature.

2. 2

   Body Shape

   Note the deep, compressed body and the large head relative to the body size.

3. 3

   Mouth

   Observe the large mouth with a slightly inferior jaw, indicating its predatory feeding habits.

4. 4

   Lateral Line

   The prominent lateral line extending onto the caudal fin is a feature common to many Sciaenids, but useful in conjunction with other traits.

Explore Black Jewfish