Cara Mengenal Pasti John's Snapper

Untuk mengenal pasti John's Snapper (Lutjanus johnii), perhatikan ciri-ciri utama berikut.

Ciri-ciri Fizikal

Bentuk badan

compressed

Warna

Adults typically exhibit a brassy yellow to reddish-brown coloration dorsally, fading to silvery-white ventrally. The fins are often yellowish. A distinctive, large, black, oval-shaped spot is usually present on the lateral line below the anterior soft dorsal fin rays. This spot can be less prominent or absent in very large individuals or after death. Juveniles are often more silvery with a more pronounced spot.

Jenis sisik

ctenoid

Kedudukan mulut

terminal

Ciri tersendiri

Large, prominent black spot on the lateral line below the soft dorsal fin., Relatively deep body, compressed laterally., Large mouth with canine teeth., Scales on the preoperculum and operculum., Slightly emarginate caudal fin.

Sirip dorsal

Single dorsal fin with 10 spines followed by 13-14 soft rays. The spinous and soft-rayed portions are continuous.

Sirip ekor

Caudal fin is slightly emarginate (forked).

Sirip pektoral

Pectoral fins are relatively long, reaching to or beyond the anus, with 16-17 rays.

Sirip tersendiri

Anal fin with 3 spines and 8-9 soft rays. Pelvic fins are thoracic.

Petua Pengenalan

1. 1

   Black Spot

   Look for the characteristic large, black, oval spot on the lateral line, below the anterior part of the soft dorsal fin. This is the most reliable distinguishing feature, though it can fade.

2. 2

   Body Shape and Coloration

   Note the brassy yellow to reddish-brown dorsal coloration fading to silvery-white, and the relatively deep, compressed body. Fins are often yellowish.

3. 3

   Fin Ray Counts

   Count the dorsal fin rays (10 spines, 13-14 soft rays) and anal fin rays (3 spines, 8-9 soft rays) for definitive identification, especially when the spot is faded.

4. 4

   Mouth and Teeth

   Observe the large mouth with prominent canine teeth, typical of predatory snappers.

Terokai John's Snapper