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Zebrasoma flavescens, commonly known as the Yellow Tang, is a vibrant marine fish belonging to the family Acanthuridae (surgeonfishes). It is highly prized in the aquarium trade due to its striking coloration and active swimming behavior. This species is characterized by its compressed, disc-shaped body and a prominent, sail-like dorsal fin. Its most distinctive feature is its uniform, brilliant yellow coloration, which can intensify or slightly darken depending on the fish's mood, health, or time of day. Like all surgeonfishes, it possesses a sharp, scalpel-like spine (scapel) on each side of the caudal peduncle, which is used for defense and territorial disputes.
Caratteristiche fisiche
- Forma del corpo
- compressed
- Colorazione
- Uniform, brilliant yellow across the entire body, fins, and tail. Color may slightly darken at night or when stressed, sometimes exhibiting a faint horizontal white band.
- Tipo di squame
- ctenoid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Bright yellow coloration, Compressed, disc-shaped body, Prominent, sail-like dorsal and anal fins, Scalpel-like spine (scapel) on each side of the caudal peduncle
- Pinna dorsale
- Single, long dorsal fin with 4-5 spines and 23-26 soft rays, extending almost the entire length of the back, giving it a sail-like appearance.
- Pinna caudale
- Truncate to slightly emarginate caudal fin.
- Pinna pettorale
- Small, rounded pectoral fins.
- Pinne distintive
- Large, sail-like dorsal and anal fins are characteristic of the genus Zebrasoma. The caudal peduncle bears a single, sharp, retractable spine on each side.
Consigli per l'identificazione
Coloration
Its uniform, bright yellow body is the most immediate and reliable identifier. No other common surgeonfish shares this exact coloration.
Body Shape
The highly compressed, disc-like body with a pointed snout and tall, sail-like dorsal and anal fins distinguishes it from other tangs like those in the genus Acanthurus (which tend to be more oval-shaped).
Caudal Spine
Observe the characteristic scalpel-like spine on the caudal peduncle, typical of all surgeonfishes. While not unique to Z. flavescens, its presence confirms it as a surgeonfish.
Habitat
- Tipo di acqua
- saltwater
- Profondità
- Typically found in shallow reef environments, from 2 to 46 meters (6 to 150 feet), but most commonly observed in depths less than 20 meters.
- Ambiente
- Coral reefs, rocky areas, and lagoons with abundant algal growth. They are often seen grazing on algae from rocks and coral surfaces.
- Areale geografico
- Endemic to the Pacific Ocean, primarily around the Hawaiian Islands and Johnston Atoll. Also found in smaller populations in the western Pacific, including parts of Japan and the Philippines, though these are often considered introduced or vagrant populations.
Informazioni sull'acquario
- Livello di cura: intermediate
- Temperamento: semi-aggressive
- Dieta: herbivore
- Dimensione minima della vasca: 100 gallons (378 liters)
- Temperatura: 72-82°F (22-28°C)
- Livello di pH: 8.1-8.4
- Durezza: 8-12 dKH
- Compatibilità: Generally compatible with other non-aggressive marine fish. Can be territorial towards other tangs, especially those of similar shape or color. Best kept as a single specimen or in a very large tank with multiple tangs introduced simultaneously.
- Requisiti speciali: Requires a well-established aquarium with ample live rock for grazing and hiding. Strong water flow and excellent filtration are essential. A varied diet rich in marine algae is crucial for health and color retention. Prone to lateral line erosion if not fed a proper diet and kept in pristine water conditions.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: No specific seasonality for reproduction or migration; present year-round in its natural habitat.
- Prezzo di mercato: Moderate to high, depending on size and origin.
- Importanza commerciale: high
- Sapore: Not commonly consumed due to its small size and value in the aquarium trade.
- Consistenza: N/A
- Valore nutrizionale: N/A
Fatti chiave
Algae Grazerbehavior
Yellow Tangs are primarily herbivorous, playing a crucial role in coral reef ecosystems by grazing on algae, which helps prevent overgrowth and allows corals to thrive.
Color Changeinteresting
Their vibrant yellow color can slightly fade or develop a horizontal white band at night or when stressed, serving as a form of camouflage or a stress indicator.
Aquarium Stapleamazing
Despite being wild-caught, the Yellow Tang is one of the most popular and recognizable marine aquarium fish globally, driving a significant portion of the ornamental fish trade.
Hawaiian Endemicinteresting
The largest and most stable populations of Zebrasoma flavescens are found around the Hawaiian Islands, making it a significant species for the region's marine biodiversity.
Surgeon's Scalpelevolution
The common name 'surgeonfish' comes from the razor-sharp, retractable spine located on each side of the caudal peduncle, which resembles a surgeon's scalpel.
Informazioni di sicurezza
Maneggiare con cura- Livello di sicurezza: caution
- Velenoso: No
- Commestibilità: not recommended
- Note sul maneggio: The scalpel-like spines on the caudal peduncle are extremely sharp and can inflict painful cuts. While not venomous, these wounds can become infected. Handle with extreme care, preferably using a net to transfer and avoiding direct contact with the caudal peduncle area. In the wild, they use these spines for defense against predators and during territorial disputes.
Specie simili
Scopas Tang
Zebrasoma scopas
While sharing a similar body shape, Z. scopas is typically brown to dark brown, often with a mottled pattern, and lacks the vibrant yellow of Z. flavescens. Juveniles of Z. scopas can sometimes be yellowish, but they will have distinct spots or patterns not present in Z. flavescens.
Purple Tang
Zebrasoma xanthurum
Z. xanthurum has a deep purple body with a bright yellow tail and yellow pectoral fins. Its body is distinctly purple, not entirely yellow.
Sailfin Tang
Zebrasoma veliferum
Z. veliferum is much larger and has a body patterned with vertical dark and light bands, not a uniform yellow. Its fins are also much larger and more pronounced.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Acanthuriformes
- Famiglia
- Acanthuridae
- Genere
- Zebrasoma
- Specie
- flavescens
Esplora Yellow Tang
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