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Pomadasys incisus, commonly known as the Bastard Grunt, is a species of marine ray-finned fish belonging to the family Haemulidae, the grunts. It is characterized by its moderately compressed body, relatively small mouth, and distinctive coloration. This species is known for its ability to produce a grunting sound by grinding its pharyngeal teeth, which is amplified by the swim bladder.
Caratteristiche fisiche
- Forma del corpo
- compressed
- Colorazione
- The body is typically silvery-grey to brownish-grey dorsally, fading to silvery-white ventrally. Juveniles and sometimes adults exhibit several faint, longitudinal dark stripes or rows of spots along the flanks. The fins are generally dusky or yellowish, with the caudal fin often having a darker margin.
- Tipo di squame
- ctenoid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Moderately compressed body, Relatively small, terminal mouth, Thick lips, Two pores and a median groove on the chin, Preopercle finely serrated, Scales are ctenoid and cover the body and head (except snout and chin)
- Pinna dorsale
- Single dorsal fin with 12-13 spines and 13-15 soft rays. The spinous portion is longer than the soft-rayed portion, and there is a distinct notch between them.
- Pinna caudale
- Caudal fin is moderately forked.
- Pinna pettorale
- Pectoral fins are relatively long, reaching beyond the pelvic fin origin.
- Pinne distintive
- Anal fin with 3 strong spines and 11-12 soft rays. The second anal spine is notably robust and longer than the third.
Consigli per l'identificazione
Body Shape and Coloration
Look for a moderately compressed, silvery-grey body with faint longitudinal stripes (especially in younger individuals). The overall appearance is robust.
Mouth and Chin
Observe the relatively small, terminal mouth with thick lips. The presence of two pores and a median groove on the chin is a key diagnostic feature for the genus Pomadasys.
Dorsal and Anal Fins
Note the single dorsal fin with a distinct notch and the strong, prominent second anal fin spine, which is longer than the third.
Grunting Sound
If handled, this fish may produce a characteristic grunting sound, which is a definitive trait of the Haemulidae family.
Habitat
- Tipo di acqua
- saltwater
- Profondità
- Typically found in shallow coastal waters, from the surface down to about 80 meters (260 feet), though most commonly observed in less than 50 meters.
- Ambiente
- Inhabits rocky bottoms, seagrass beds, and sandy areas near reefs. Juveniles often found in estuaries and sheltered bays.
- Areale geografico
- Eastern Atlantic Ocean, from the Strait of Gibraltar south to Angola, including the Canary Islands, Cape Verde, and São Tomé. Also present in the Mediterranean Sea, particularly the western and central basins, having entered through the Strait of Gibraltar.
Informazioni sull'acquario
- Livello di cura: intermediate
- Temperamento: semi-aggressive
- Dieta: carnivore
- Dimensione minima della vasca: 200 gallons
- Temperatura: 22-26°C (72-79°F)
- Livello di pH: 8.1-8.4
- Durezza: 8-12 dKH
- Compatibilità: Can be kept with other robust, similarly sized marine fish. Avoid very small or overly aggressive tank mates.
- Requisiti speciali: Requires a well-established marine aquarium with plenty of swimming space and rockwork for shelter. A varied diet of meaty foods is essential. Good filtration is necessary due to their carnivorous diet.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Generally available year-round in its distribution range, with peak catches often coinciding with warmer months.
- Prezzo di mercato: Varies by region and size, generally moderate.
- Importanza commerciale: medium
- Sapore: Mild, slightly sweet
- Consistenza: Flaky, firm white flesh
- Metodi di cottura: Baked, Grilled, Fried, Steamed
- Valore nutrizionale: Good source of lean protein and omega-3 fatty acids.
Fatti chiave
Sound Productionbehavior
Pomadasys incisus, like other grunts, produces a characteristic 'grunting' sound by grinding its pharyngeal teeth, which is amplified by its swim bladder. This sound is often heard when the fish is stressed or caught.
Dietary Habitsbehavior
This species is primarily a nocturnal feeder, preying on small benthic invertebrates such as crustaceans, mollusks, and polychaetes, which it extracts from the substrate.
Juvenile Habitatsbehavior
Juvenile Bastard Grunts often utilize sheltered coastal areas, including estuaries and seagrass beds, as nursery grounds, providing protection from predators and abundant food resources.
Taxonomic Stabilityevolution
The species Pomadasys incisus has a relatively stable taxonomic history, with few significant recent changes or widely accepted synonyms, making its identification straightforward within its genus.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: No specific handling precautions beyond standard fish handling. The dorsal and anal fin spines can be sharp, so care should be taken to avoid punctures. They may grunt when handled, which is harmless.
Specie simili
Striped Grunt
Pomadasys stridens
P. stridens typically has more pronounced and numerous dark longitudinal stripes, often extending onto the head. Its body is generally more elongated, and the second anal spine is usually less robust than in P. incisus.
Rubberlip Grunt
Plectorhinchus mediterraneus
While also a grunt, P. mediterraneus has much thicker, fleshy lips, a more elongated body, and a different coloration pattern, often with dark spots or blotches, especially when juvenile. Its dorsal fin profile is also different.
White Grunt
Haemulon plumierii
H. plumierii is an Atlantic species (not typically found in the Mediterranean) with a more silvery body and often yellow or orange fins. It lacks the distinct chin pores and groove characteristic of Pomadasys.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Perciformes
- Famiglia
- Haemulidae
- Genere
- Pomadasys
- Specie
- incisus
Esplora Bastard Grunt
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