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Pomadasys argenteus, commonly known as the Silver Grunter or Gerut-gerut Berjalur Perak, is a medium-sized marine fish belonging to the family Haemulidae (grunts or sweetlips). It is characterized by its silvery body, often with faint longitudinal stripes or spots, and a distinctive grunting sound produced by pharyngeal teeth. This species is commercially important in many parts of its range and is a popular target for both commercial and recreational fisheries.
Ciri-ciri Fizikal
- Bentuk badan
- compressed
- Warna
- Overall silvery-grey, often with a darker dorsal surface fading to a lighter belly. Juveniles and sometimes adults may exhibit several faint, dusky longitudinal stripes or rows of small dark spots along the flanks. Fins are typically dusky or yellowish. The inside of the mouth is often reddish.
- Jenis sisik
- ctenoid
- Kedudukan mulut
- terminal
- Ciri tersendiri
- Silvery body coloration, Often faint longitudinal stripes or rows of spots, Small mouth with thick lips, Two pores and a median groove on the chin, Produces a grunting sound when removed from water or stressed
- Sirip dorsal
- Single dorsal fin, deeply notched, with 12-13 spines and 13-15 soft rays. The spinous portion is longer than the soft-rayed portion.
- Sirip ekor
- Caudal fin is moderately forked.
- Sirip pektoral
- Pectoral fins are relatively long and pointed.
- Sirip tersendiri
- Anal fin with 3 strong spines and 7-8 soft rays. Pelvic fins are thoracic.
Petua Pengenalan
Body Shape and Coloration
Look for the compressed, silvery body, often with subtle longitudinal stripes or rows of spots. The overall appearance is sleek and robust.
Mouth and Chin
Observe the relatively small mouth with thick lips. The presence of two distinct pores and a median groove on the chin is a key characteristic of the genus Pomadasys.
Dorsal Fin
Note the single, deeply notched dorsal fin with a prominent spinous portion (12-13 spines) and a shorter soft-rayed portion (13-15 rays).
Sound Production
If handled, listen for the characteristic 'grunting' sound produced by the fish, which is a definitive feature of grunters (Haemulidae).
Habitat
- Jenis air
- saltwater
- Kedalaman
- Typically found in shallow coastal waters, from 1 to 75 meters, but most commonly in less than 30 meters.
- Persekitaran
- Inhabits sandy or muddy bottoms, often near rocky reefs, estuaries, and mangrove areas. Juveniles are frequently found in brackish waters of estuaries and coastal lagoons, utilizing these areas as nursery grounds. Adults tend to move to deeper coastal waters.
- Julat geografi
- Indo-West Pacific: Red Sea and East Africa to Samoa, north to southern Japan, south to northern Australia. Widely distributed throughout Southeast Asia, including Malaysia, Indonesia, Thailand, and the Philippines.
Maklumat Akuarium
- Tahap penjagaan: intermediate
- Perangai: semi-aggressive
- Diet: carnivore
- Saiz tangki minimum: 200 gallons
- Suhu: 24-28°C (75-82°F)
- Tahap pH: 8.1-8.4
- Kekerasan air: 8-12 dKH
- Keserasian: Can be kept with other robust, similarly sized marine fish. Avoid very small or overly aggressive tank mates. May prey on smaller invertebrates.
- Keperluan khas: Requires a large tank with ample swimming space and hiding spots. Good filtration is essential due to their carnivorous diet. Can be sensitive to poor water quality. May produce grunting sounds, especially when stressed or during feeding.
Maklumat Liar
- Status pemuliharaan: least concern
- Musim: Available year-round, though local abundance may vary with seasonal spawning aggregations and fishing pressure.
- Harga pasaran: Moderate to high, depending on region and size.
- Kepentingan komersial: high
- Rasa: Mild, slightly sweet, and flaky white flesh.
- Tekstur: Firm and moist.
- Kaedah memasak: Grilling, Frying, Steaming, Baking, Curry
- Nilai pemakanan: Good source of lean protein, Omega-3 fatty acids, and essential vitamins and minerals.
Fakta utama
Grunting Soundbehavior
Pomadasys argenteus, like other grunters, produces a distinctive grunting sound by rubbing pharyngeal teeth together, which is amplified by the swim bladder. This sound is often heard when the fish is stressed or caught.
Estuarine Nurseriesbehavior
Juvenile Silver Grunters frequently inhabit estuaries and mangrove areas, utilizing these productive brackish water environments as crucial nursery grounds before migrating to more open coastal waters as adults.
Dietary Shiftbehavior
Their diet shifts with age; juveniles primarily feed on small crustaceans and worms, while adults consume a wider range of benthic invertebrates, including larger crustaceans, mollusks, and small fish.
Commercial Importanceinteresting
This species is a significant component of artisanal and commercial fisheries throughout its Indo-West Pacific range, valued for its palatable flesh.
Maklumat keselamatan
Kendalikan dengan berhati-hati- Tahap keselamatan: caution
- Berbisa: Tidak
- Kebolehmakanan: edible
- Nota pengendalian: While not venomous, the dorsal and anal fin spines are sharp and can inflict painful punctures. Handle with care, especially when de-hooking or cleaning. Use gloves if possible. The grunting sound produced is harmless.
Spesies serupa
Spotted Grunter
Pomadasys maculatus
P. maculatus typically has more prominent, larger dark spots scattered irregularly over the body, rather than faint stripes or rows of smaller spots. The spots are usually more distinct and less organized than the markings on P. argenteus.
Lined Grunter
Pomadasys striatus
P. striatus generally exhibits more distinct and numerous dark longitudinal stripes along its flanks, which are usually more pronounced and continuous compared to the often faint or broken stripes/spots of P. argenteus.
Small-spotted Grunter
Pomadasys commersonnii
P. commersonnii often has numerous small, dark spots arranged in longitudinal rows, which can be similar to P. argenteus, but its body is generally deeper and more robust, and the spots are typically more defined and numerous.
Klasifikasi saintifik
- Kerajaan
- Animalia
- Filum
- Chordata
- Kelas
- Actinopterygii
- Ordo
- Perciformes
- Keluarga
- Haemulidae
- Genus
- Pomadasys
- Spesies
- argenteus
Terokai Silver Grunter
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