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Baryancistrus xanthellus, commonly known as the Goldnugget-Pleco, is a highly sought-after freshwater armored catfish belonging to the family Loricariidae. It is characterized by its striking black body adorned with numerous bright yellow to orange spots, and often a prominent yellow band on the dorsal and caudal fins. This species is known for its robust build, flattened ventral surface, and a large, powerful suckermouth adapted for scraping algae and biofilm from submerged surfaces. It is a benthic species, primarily active during twilight and nighttime hours.
Körperliche Merkmale
- Körperform
- flat
- Färbung
- Dark black to brownish-black body covered with numerous bright yellow to orange spots. The intensity and size of the spots can vary. Often, the dorsal fin and the upper and lower lobes of the caudal fin have a distinct yellow to orange margin or band.
- Schuppentyp
- none
- Maulstellung
- inferior
- Besondere Merkmale
- Prominent yellow to orange spots covering the entire body and fins., Often a distinct yellow band on the dorsal and caudal fins., Large, powerful suckermouth with numerous small, spoon-shaped teeth adapted for scraping., Robust, armored body with dermal plates., Relatively large dorsal fin and a strong, often pointed, caudal fin.
- Rückenflosse
- Large and tall, often with a prominent yellow or orange band along its margin. Typically has one spine and seven soft rays.
- Schwanzflosse
- Truncate to slightly emarginate, often with a distinct yellow or orange band on the upper and lower lobes. The caudal fin is powerful and used for propulsion.
- Brustflosse
- Broad and strong, positioned ventrally, aiding in gripping surfaces and maneuvering. Each fin has one spine and five soft rays.
- Auffällige Flossen
- Adipose fin present, typically small and with a spine. Pelvic fins are also broad and ventrally positioned.
Bestimmungstipps
Spot Pattern
The most defining characteristic is the bright yellow to orange spots on a dark body. The size and density of these spots can vary, but they are always present and distinct.
Fin Coloration
Look for a prominent yellow or orange band along the edge of the dorsal fin and often on the upper and lower lobes of the caudal fin. This is a key differentiator from some other Baryancistrus species.
Body Shape
Robust, somewhat flattened body, typical of plecos adapted to fast-flowing waters. The head is broad and the mouth is a large suckermouth.
L-number
Often identified by its L-numbers: L018, L085, and L177. These numbers refer to variations in spot size and fin coloration, but all are considered B. xanthellus.
Lebensraum
- Wassertyp
- freshwater
- Tiefe
- Typically found in shallow to moderate depths of fast-flowing rivers, often in rapids and areas with strong currents.
- Umgebung
- Prefers clear, highly oxygenated waters with rocky substrates, submerged wood, and areas with abundant biofilm and algal growth. They are often found clinging to rocks in strong currents.
- Geografische Verbreitung
- Endemic to the Xingu River basin in Brazil, particularly in the lower and middle sections of the river, including its tributaries.
Aquarieninformationen
- Pflegeaufwand: intermediate
- Temperament: territorial
- Ernährung: herbivore
- Mindestbeckengröße: 200 liters
- Temperatur: 26-30°C
- pH-Wert: 6.0-7.5
- Härte: 2-15 dGH
- Verträglichkeit: Can be kept with other peaceful to semi-aggressive, similarly sized fish. Avoid keeping with other large plecos or bottom-dwellers unless the tank is very large and offers ample hiding spots, as they can be territorial towards conspecifics and similar species.
- Besondere Anforderungen: Requires a well-oxygenated tank with strong water flow, numerous hiding places (caves, driftwood, rocks), and a diet rich in vegetable matter. High-quality filtration is essential due to their significant waste production. They are sensitive to poor water quality and require stable parameters. Provide smooth rocks for grazing and a soft substrate to prevent injury to their barbels.
Informationen zum Wildbestand
- Erhaltungszustand: least concern
- Saisonalität: No specific seasonal behavior patterns are documented for wild capture, but breeding in the wild is likely influenced by rainy seasons and associated water level changes.
- Marktpreis: Varies significantly based on size and spot pattern, often ranging from $50 to $300+
- Kommerzielle Bedeutung: medium
- Geschmack: Not typically consumed due to its bony structure and armored plates.
- Textur: Firm, bony.
- Nährwert: Not a food fish.
Wichtige Fakten
L-Number Systeminteresting
The Goldnugget-Pleco is known by multiple 'L-numbers' (L018, L085, L177), which are informal designations used by aquarists and exporters to identify undescribed or newly discovered Loricariidae species. These numbers often refer to variations within the same species.
Algae Scraperbehavior
Its specialized suckermouth and spoon-shaped teeth are perfectly adapted for scraping biofilm and algae from hard surfaces in fast-flowing river environments.
Territorial Naturebehavior
Despite being herbivores, Goldnugget-Plecos can be highly territorial, especially towards conspecifics and other bottom-dwelling fish, aggressively defending their preferred hiding spots and feeding grounds.
Xingu Endemicinteresting
This species is endemic to the Xingu River in Brazil, a region renowned for its high biodiversity and unique fish fauna, which is currently under threat from hydroelectric dam projects.
Sicherheitsinformationen
Vorsichtig behandeln- Sicherheitsstufe: caution
- Giftig: Nein
- Essbarkeit: not recommended
- Hinweise zum Umgang: While not venomous, Goldnugget-Plecos possess sharp fin spines (especially the dorsal and pectoral fins) that can cause painful punctures if handled carelessly. They can also lock their spines, making them difficult to remove from nets or hands. Always use a sturdy container or thick gloves when handling. Their suckermouth can also create a strong suction, making them difficult to dislodge from surfaces.
Ähnliche Arten
Magnum Pleco
Baryancistrus chrysolomus
B. chrysolomus (L047) typically has larger, fewer, and more irregularly shaped yellow spots, and the yellow coloration on the fins is usually more extensive, often covering a larger portion of the fin rather than just a distinct band. The body shape can also appear slightly more elongated.
Flash Pleco
Baryancistrus sp. (L200)
The Flash Pleco (L200) has a similar body shape but typically exhibits smaller, more numerous, and often greenish-yellow spots. The fin margins are usually yellow but less intensely colored than in B. xanthellus, and the overall body color can be lighter.
Titanic Pleco
Baryancistrus sp. (L027)
The Titanic Pleco (L027) is a larger species with a more uniform dark body color and very small, almost iridescent, white to yellowish spots that are much less prominent than those of B. xanthellus. Its fin margins are typically less distinctly colored.
Wissenschaftliche Klassifikation
- Reich
- Animalia
- Stamm
- Chordata
- Klasse
- Actinopterygii
- Ordnung
- Siluriformes
- Familie
- Loricariidae
- Gattung
- Baryancistrus
- Art
- xanthellus
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