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Diplodus argenteus, commonly known as Sargo-olhal, is a species of marine ray-finned fish belonging to the family Sparidae, the seabreams and porgies. It is characterized by its silvery body, large eyes, and a distinctive dark spot at the base of the caudal fin. This species is a demersal fish, typically found in coastal waters over rocky or sandy bottoms.
Füüsilised omadused
- Keha kuju
- compressed
- Värvus
- Silvery-white body, often with faint vertical bands that may fade after capture. A prominent, dark, saddle-like spot is present on the caudal peduncle, extending onto the base of the caudal fin. Fins are generally translucent or slightly yellowish.
- Soomuse tüüp
- ctenoid
- Suu asend
- terminal
- Eristuvad tunnused
- Large eyes, proportionally larger than other Diplodus species., A single, prominent dark spot on the caudal peduncle., Relatively deep body, laterally compressed., Small, terminal mouth with incisor-like teeth in the front and molars posteriorly.
- Seljauim
- Single dorsal fin with 11-12 spines and 12-14 soft rays. The spiny portion is longer than the soft-rayed portion.
- Sabauim
- Moderately forked caudal fin.
- Rinnauim
- Long and pointed pectoral fins.
- Eristuvad uimed
- Pelvic fins are thoracic, located directly below the pectoral fins.
Tuvastusnõuanded
Caudal Spot
The most reliable distinguishing feature is the large, dark, saddle-like spot on the caudal peduncle, which extends onto the base of the caudal fin. This spot is typically more pronounced and covers a larger area than in other Diplodus species.
Eye Size
Diplodus argenteus possesses noticeably larger eyes relative to its head size compared to other sargos, giving it the common name 'olhal' (large-eyed).
Body Shape
Its body is relatively deep and compressed, with a high back profile.
Coloration
The overall silvery coloration, sometimes with faint vertical bars, helps differentiate it from species with more prominent banding.
Elupaik
- Vee tüüp
- saltwater
- Sügavus
- Typically found from the surface down to 100 meters (330 feet), but most commonly in shallower coastal waters (5-50 meters).
- Keskkond
- Prefers rocky reefs, seagrass beds, and sandy bottoms near rocky outcrops. Juveniles often inhabit estuaries and sheltered bays.
- Geograafiline levik
- Eastern Atlantic Ocean, from Portugal south to Angola, including the Canary Islands, Cape Verde, and São Tomé and Príncipe. Also found in the Mediterranean Sea, though less common than in the Atlantic.
Akvaariumi teave
- Hooldustase: advanced
- Temperament: semi-aggressive
- Toitumine: carnivore
- Minimaalne paagi suurus: 500 gallons
- Temperatuur: 18-24°C (64-75°F)
- pH tase: 8.1-8.4
- Karedus: 8-12 dKH
- Ühilduvus: Best kept in a species-specific tank or with other large, robust marine fish. Can be territorial, especially towards conspecifics.
- Erinõuded: Requires a large tank with plenty of swimming space and rockwork for shelter. Excellent filtration and stable water parameters are crucial. Not typically kept in home aquaria due to size and specific needs.
Looduslik teave
- Kaitsestaatus: least concern
- Hooajalisus: Spawning typically occurs in late spring to early summer. More abundant in coastal waters during warmer months.
- Turuhind: Moderate to high, depending on region and size.
- Kaubanduslik tähtsus: medium
- Maitse: Mild, flaky white flesh with a delicate flavor.
- Tekstuur: Firm and moist.
- Valmistamisviisid: baked, grilled, fried, steamed
- Toiteväärtus: Good source of lean protein, Omega-3 fatty acids, and essential vitamins and minerals.
Põhifaktid
Large-Eyed Sargointeresting
The common name 'Sargo-olhal' directly translates to 'large-eyed sargo', a key morphological feature that helps distinguish it from other Diplodus species.
Habitat Generalistbehavior
Diplodus argenteus demonstrates adaptability, inhabiting a wide range of coastal environments from rocky reefs to sandy bottoms and even estuaries during its juvenile phase.
Dietary Flexibilitybehavior
While primarily carnivorous, feeding on small invertebrates, its dentition (incisors and molars) suggests a capacity for a more varied diet, including some plant matter or hard-shelled organisms.
Hermaphroditismevolution
Like many sparids, Diplodus argenteus is a protandrous hermaphrodite, meaning individuals mature first as males and later transition to females. This reproductive strategy is common in the family.
Ohutuseteave
Ohutu- Ohutustase: safe
- Mürgine: Ei
- Söödavus: edible
- Käsitsemisjuhised: No specific venomous spines or toxic properties. Handle with care due to sharp dorsal fin spines and opercular edges, as with most fish. Can deliver a painful nip if handled carelessly.
Sarnased liigid
White Seabream
Diplodus sargus
Diplodus sargus typically has 5-9 distinct dark vertical bands on its body and a smaller, less prominent caudal spot that does not extend as far onto the caudal fin. Its eyes are also proportionally smaller.
Annular Seabream
Diplodus annularis
Diplodus annularis is generally smaller, has a more elongated body, and is characterized by a distinct black ring around the caudal peduncle, rather than a saddle-like spot. Its fins often have a yellowish tint.
Zebra Seabream
Diplodus cervinus
Diplodus cervinus is much larger and has very prominent, broad dark vertical bands (usually 5-7) that are much more distinct than any faint banding on D. argenteus. It also lacks the large caudal spot of D. argenteus.
Teaduslik klassifikatsioon
- Riik
- Animalia
- Hõimkond
- Chordata
- Klass
- Actinopterygii
- Selts
- Spariformes
- Sugukond
- Sparidae
- Perekond
- Diplodus
- Liik
- Diplodus argenteus
Uuri lähemalt: Sargo-olhal
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