John's Snapper

Penerangan

Lutjanus johnii, commonly known as John's Snapper, is a medium to large-sized marine ray-finned fish belonging to the family Lutjanidae. It is a commercially important species throughout its Indo-Pacific range, valued for its firm, white flesh. This species is characterized by its robust body, distinctive coloration, and a prominent black spot on its flank, which can sometimes fade in larger or preserved specimens. It is a predatory fish, typically found in coastal waters, estuaries, and coral reefs.

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

Habitat

Jenis air

saltwater

Kedalaman

Typically found in depths ranging from 5 to 80 meters (16 to 262 feet), though occasionally deeper.

Persekitaran

Inhabits coastal waters, including estuaries, mangrove areas, rocky reefs, and coral reefs. Juveniles are often found in shallower, protected estuarine and mangrove habitats, moving to deeper reef environments as they mature. They are often associated with structures such as wrecks and jetties.

Julat geografi

Widespread in the Indo-West Pacific region, from the Red Sea and East Africa eastward to Fiji, northward to southern Japan, and southward to Australia.

Maklumat Akuarium

• Tahap penjagaan: advanced
• Perangai: semi-aggressive
• Diet: carnivore
• Saiz tangki minimum: 500 gallons
• Suhu: 24-28°C (75-82°F)
• Tahap pH: 8.1-8.4
• Kekerasan air: 8-12 dKH
• Keserasian: Best kept in a species-specific tank or with other large, robust, and semi-aggressive fish that cannot be swallowed. Avoid small or docile tank mates.
• Keperluan khas: Requires a very large aquarium with ample swimming space and strong filtration. Provide plenty of rockwork for hiding and territorial establishment. A varied diet of high-quality meaty foods is essential. Can be sensitive to poor water quality.

Maklumat Liar

• Status pemuliharaan: least concern
• Musim: Available year-round in many parts of its range, though local fishing seasons and regulations may apply.
• Harga pasaran: Varies significantly by region and size, generally considered a premium food fish.
• Kepentingan komersial: high
• Rasa: Mild, sweet, and delicate
• Tekstur: Firm, flaky, and moist
• Kaedah memasak: baking, grilling, frying, steaming, sashimi
• Nilai pemakanan: Excellent source of lean protein, Omega-3 fatty acids, and essential vitamins and minerals.

Fakta utama

Spesies serupa

Klasifikasi saintifik

Kerajaan

Animalia

Filum

Chordata

Kelas

Actinopterygii

Ordo

Perciformes

Keluarga

Lutjanidae

Genus

Lutjanus

Spesies

Lutjanus johnii

Terokai John's Snapper